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Finding the Fourth Proportional to 292,612.40, 438,655.80 and 115,240.40

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Solution

The fourth proportional to 292,612.40, 438,655.80 and 115,240.40 is: 172,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,612.40 : 438,655.80 = 115,240.40 : x
  2. Step 2: Convert to fraction form
    292,612.40/438,655.80 = 115,240.40/x
  3. Step 3: Cross multiply
    292,612.40x = 438,655.80 × 115,240.40
  4. Step 4: Simplify right side
    292,612.40x = 50,550,869,854.32
  5. Step 5: Solve for x
    x = 50,550,869,854.32/292,612.40
  6. Step 6: Final answer
    x = 172,757.10

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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.