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Finding the Fourth Proportional to 642,508.71, 886,638.50 and 370,588.06

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Solution

The fourth proportional to 642,508.71, 886,638.50 and 370,588.06 is: 511,397.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,508.71 : 886,638.50 = 370,588.06 : x
  2. Step 2: Convert to fraction form
    642,508.71/886,638.50 = 370,588.06/x
  3. Step 3: Cross multiply
    642,508.71x = 886,638.50 × 370,588.06
  4. Step 4: Simplify right side
    642,508.71x = 328,577,644,365.95
  5. Step 5: Solve for x
    x = 328,577,644,365.95/642,508.71
  6. Step 6: Final answer
    x = 511,397.96

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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.