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Finding the Fourth Proportional to 553,000.69, 763,082.13 and 311,279.14

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Solution

The fourth proportional to 553,000.69, 763,082.13 and 311,279.14 is: 429,532.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,000.69 : 763,082.13 = 311,279.14 : x
  2. Step 2: Convert to fraction form
    553,000.69/763,082.13 = 311,279.14/x
  3. Step 3: Cross multiply
    553,000.69x = 763,082.13 × 311,279.14
  4. Step 4: Simplify right side
    553,000.69x = 237,531,549,175.77
  5. Step 5: Solve for x
    x = 237,531,549,175.77/553,000.69
  6. Step 6: Final answer
    x = 429,532.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.