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Finding the Fourth Proportional to 642,693.19, 962,987.94 and 390,051.12

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Solution

The fourth proportional to 642,693.19, 962,987.94 and 390,051.12 is: 584,438.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,693.19 : 962,987.94 = 390,051.12 : x
  2. Step 2: Convert to fraction form
    642,693.19/962,987.94 = 390,051.12/x
  3. Step 3: Cross multiply
    642,693.19x = 962,987.94 × 390,051.12
  4. Step 4: Simplify right side
    642,693.19x = 375,614,524,543.49
  5. Step 5: Solve for x
    x = 375,614,524,543.49/642,693.19
  6. Step 6: Final answer
    x = 584,438.31

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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.