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Finding the Fourth Proportional to 290,532.80, 435,712.80 and 112,937.60

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Solution

The fourth proportional to 290,532.80, 435,712.80 and 112,937.60 is: 169,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,532.80 : 435,712.80 = 112,937.60 : x
  2. Step 2: Convert to fraction form
    290,532.80/435,712.80 = 112,937.60/x
  3. Step 3: Cross multiply
    290,532.80x = 435,712.80 × 112,937.60
  4. Step 4: Simplify right side
    290,532.80x = 49,208,357,921.28
  5. Step 5: Solve for x
    x = 49,208,357,921.28/290,532.80
  6. Step 6: Final answer
    x = 169,372.81

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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.