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Finding the Fourth Proportional to 257,445.72, 386,220.60 and 88,972.20

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Solution

The fourth proportional to 257,445.72, 386,220.60 and 88,972.20 is: 133,476.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,445.72 : 386,220.60 = 88,972.20 : x
  2. Step 2: Convert to fraction form
    257,445.72/386,220.60 = 88,972.20/x
  3. Step 3: Cross multiply
    257,445.72x = 386,220.60 × 88,972.20
  4. Step 4: Simplify right side
    257,445.72x = 34,362,896,467.32
  5. Step 5: Solve for x
    x = 34,362,896,467.32/257,445.72
  6. Step 6: Final answer
    x = 133,476.28

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1.5x scale

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.