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Finding the Fourth Proportional to 338,553.60, 508,024.80 and 128,342.40

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Solution

The fourth proportional to 338,553.60, 508,024.80 and 128,342.40 is: 192,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,553.60 : 508,024.80 = 128,342.40 : x
  2. Step 2: Convert to fraction form
    338,553.60/508,024.80 = 128,342.40/x
  3. Step 3: Cross multiply
    338,553.60x = 508,024.80 × 128,342.40
  4. Step 4: Simplify right side
    338,553.60x = 65,201,122,091.52
  5. Step 5: Solve for x
    x = 65,201,122,091.52/338,553.60
  6. Step 6: Final answer
    x = 192,587.30

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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.