Home / 810,011.80-1,215,017.70-210,968.20

Finding the Fourth Proportional to 810,011.80, 1,215,017.70 and 210,968.20

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Solution

The fourth proportional to 810,011.80, 1,215,017.70 and 210,968.20 is: 316,452.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,011.80 : 1,215,017.70 = 210,968.20 : x
  2. Step 2: Convert to fraction form
    810,011.80/1,215,017.70 = 210,968.20/x
  3. Step 3: Cross multiply
    810,011.80x = 1,215,017.70 × 210,968.20
  4. Step 4: Simplify right side
    810,011.80x = 256,330,097,137.14
  5. Step 5: Solve for x
    x = 256,330,097,137.14/810,011.80
  6. Step 6: Final answer
    x = 316,452.30

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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.