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Finding the Fourth Proportional to 612,109.80, 918,164.70 and 433,650.60

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Solution

The fourth proportional to 612,109.80, 918,164.70 and 433,650.60 is: 650,475.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,109.80 : 918,164.70 = 433,650.60 : x
  2. Step 2: Convert to fraction form
    612,109.80/918,164.70 = 433,650.60/x
  3. Step 3: Cross multiply
    612,109.80x = 918,164.70 × 433,650.60
  4. Step 4: Simplify right side
    612,109.80x = 398,162,673,053.82
  5. Step 5: Solve for x
    x = 398,162,673,053.82/612,109.80
  6. Step 6: Final answer
    x = 650,475.90

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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.