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Finding the Fourth Proportional to 642,661.31, 963,044.71 and 357,959.93

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Solution

The fourth proportional to 642,661.31, 963,044.71 and 357,959.93 is: 536,412.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,661.31 : 963,044.71 = 357,959.93 : x
  2. Step 2: Convert to fraction form
    642,661.31/963,044.71 = 357,959.93/x
  3. Step 3: Cross multiply
    642,661.31x = 963,044.71 × 357,959.93
  4. Step 4: Simplify right side
    642,661.31x = 344,731,417,425.92
  5. Step 5: Solve for x
    x = 344,731,417,425.92/642,661.31
  6. Step 6: Final answer
    x = 536,412.28

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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.