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Finding the Fourth Proportional to 390,340.84, 538,640.28 and 237,358.04

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Solution

The fourth proportional to 390,340.84, 538,640.28 and 237,358.04 is: 327,535.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,340.84 : 538,640.28 = 237,358.04 : x
  2. Step 2: Convert to fraction form
    390,340.84/538,640.28 = 237,358.04/x
  3. Step 3: Cross multiply
    390,340.84x = 538,640.28 × 237,358.04
  4. Step 4: Simplify right side
    390,340.84x = 127,850,601,125.85
  5. Step 5: Solve for x
    x = 127,850,601,125.85/390,340.84
  6. Step 6: Final answer
    x = 327,535.80

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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.