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Finding the Fourth Proportional to 552,998.88, 763,140.15 and 311,285.16

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Solution

The fourth proportional to 552,998.88, 763,140.15 and 311,285.16 is: 429,574.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,998.88 : 763,140.15 = 311,285.16 : x
  2. Step 2: Convert to fraction form
    552,998.88/763,140.15 = 311,285.16/x
  3. Step 3: Cross multiply
    552,998.88x = 763,140.15 × 311,285.16
  4. Step 4: Simplify right side
    552,998.88x = 237,554,203,695.17
  5. Step 5: Solve for x
    x = 237,554,203,695.17/552,998.88
  6. Step 6: Final answer
    x = 429,574.48

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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.