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Finding the Fourth Proportional to 287,262.40, 430,627.92 and 146,711.20

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Solution

The fourth proportional to 287,262.40, 430,627.92 and 146,711.20 is: 219,931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,262.40 : 430,627.92 = 146,711.20 : x
  2. Step 2: Convert to fraction form
    287,262.40/430,627.92 = 146,711.20/x
  3. Step 3: Cross multiply
    287,262.40x = 430,627.92 × 146,711.20
  4. Step 4: Simplify right side
    287,262.40x = 63,177,938,896.70
  5. Step 5: Solve for x
    x = 63,177,938,896.70/287,262.40
  6. Step 6: Final answer
    x = 219,931.11

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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.