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Finding the Fourth Proportional to 642,390.60, 962,585.10 and 242,813.40

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Solution

The fourth proportional to 642,390.60, 962,585.10 and 242,813.40 is: 363,841.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,390.60 : 962,585.10 = 242,813.40 : x
  2. Step 2: Convert to fraction form
    642,390.60/962,585.10 = 242,813.40/x
  3. Step 3: Cross multiply
    642,390.60x = 962,585.10 × 242,813.40
  4. Step 4: Simplify right side
    642,390.60x = 233,728,560,920.34
  5. Step 5: Solve for x
    x = 233,728,560,920.34/642,390.60
  6. Step 6: Final answer
    x = 363,841.81

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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.