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Finding the Fourth Proportional to 292,279.92, 438,160.68 and 142,436.40

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Solution

The fourth proportional to 292,279.92, 438,160.68 and 142,436.40 is: 213,528.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,279.92 : 438,160.68 = 142,436.40 : x
  2. Step 2: Convert to fraction form
    292,279.92/438,160.68 = 142,436.40/x
  3. Step 3: Cross multiply
    292,279.92x = 438,160.68 × 142,436.40
  4. Step 4: Simplify right side
    292,279.92x = 62,410,029,880.75
  5. Step 5: Solve for x
    x = 62,410,029,880.75/292,279.92
  6. Step 6: Final answer
    x = 213,528.28

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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.