Home / 724,715.20-1,087,072.80-512,138.80

Finding the Fourth Proportional to 724,715.20, 1,087,072.80 and 512,138.80

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Solution

The fourth proportional to 724,715.20, 1,087,072.80 and 512,138.80 is: 768,208.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,715.20 : 1,087,072.80 = 512,138.80 : x
  2. Step 2: Convert to fraction form
    724,715.20/1,087,072.80 = 512,138.80/x
  3. Step 3: Cross multiply
    724,715.20x = 1,087,072.80 × 512,138.80
  4. Step 4: Simplify right side
    724,715.20x = 556,732,159,304.64
  5. Step 5: Solve for x
    x = 556,732,159,304.64/724,715.20
  6. Step 6: Final answer
    x = 768,208.20

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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.