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Finding the Fourth Proportional to 292,513.20, 438,769.80 and 126,301.20

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Solution

The fourth proportional to 292,513.20, 438,769.80 and 126,301.20 is: 189,451.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,513.20 : 438,769.80 = 126,301.20 : x
  2. Step 2: Convert to fraction form
    292,513.20/438,769.80 = 126,301.20/x
  3. Step 3: Cross multiply
    292,513.20x = 438,769.80 × 126,301.20
  4. Step 4: Simplify right side
    292,513.20x = 55,417,152,263.76
  5. Step 5: Solve for x
    x = 55,417,152,263.76/292,513.20
  6. Step 6: Final answer
    x = 189,451.80

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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.