Home / 920,138.80-1,380,208.20-470,710.30

Finding the Fourth Proportional to 920,138.80, 1,380,208.20 and 470,710.30

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Solution

The fourth proportional to 920,138.80, 1,380,208.20 and 470,710.30 is: 706,065.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,138.80 : 1,380,208.20 = 470,710.30 : x
  2. Step 2: Convert to fraction form
    920,138.80/1,380,208.20 = 470,710.30/x
  3. Step 3: Cross multiply
    920,138.80x = 1,380,208.20 × 470,710.30
  4. Step 4: Simplify right side
    920,138.80x = 649,678,215,884.46
  5. Step 5: Solve for x
    x = 649,678,215,884.46/920,138.80
  6. Step 6: Final answer
    x = 706,065.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.