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Finding the Fourth Proportional to 485,429.40, 727,925.40 and 185,810.40

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Solution

The fourth proportional to 485,429.40, 727,925.40 and 185,810.40 is: 278,631.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,429.40 : 727,925.40 = 185,810.40 : x
  2. Step 2: Convert to fraction form
    485,429.40/727,925.40 = 185,810.40/x
  3. Step 3: Cross multiply
    485,429.40x = 727,925.40 × 185,810.40
  4. Step 4: Simplify right side
    485,429.40x = 135,256,109,744.16
  5. Step 5: Solve for x
    x = 135,256,109,744.16/485,429.40
  6. Step 6: Final answer
    x = 278,631.89

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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.