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Finding the Fourth Proportional to 389,407.30, 584,110.95 and 239,160.40

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Solution

The fourth proportional to 389,407.30, 584,110.95 and 239,160.40 is: 358,740.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,407.30 : 584,110.95 = 239,160.40 : x
  2. Step 2: Convert to fraction form
    389,407.30/584,110.95 = 239,160.40/x
  3. Step 3: Cross multiply
    389,407.30x = 584,110.95 × 239,160.40
  4. Step 4: Simplify right side
    389,407.30x = 139,696,208,446.38
  5. Step 5: Solve for x
    x = 139,696,208,446.38/389,407.30
  6. Step 6: Final answer
    x = 358,740.60

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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.