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Finding the Fourth Proportional to 288,404.38, 432,656.40 and 128,537.12

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Solution

The fourth proportional to 288,404.38, 432,656.40 and 128,537.12 is: 192,827.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,404.38 : 432,656.40 = 128,537.12 : x
  2. Step 2: Convert to fraction form
    288,404.38/432,656.40 = 128,537.12/x
  3. Step 3: Cross multiply
    288,404.38x = 432,656.40 × 128,537.12
  4. Step 4: Simplify right side
    288,404.38x = 55,612,407,605.57
  5. Step 5: Solve for x
    x = 55,612,407,605.57/288,404.38
  6. Step 6: Final answer
    x = 192,827.89

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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.