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Finding the Fourth Proportional to 288,395.71, 432,520.66 and 85,945.12

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Solution

The fourth proportional to 288,395.71, 432,520.66 and 85,945.12 is: 128,895.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,395.71 : 432,520.66 = 85,945.12 : x
  2. Step 2: Convert to fraction form
    288,395.71/432,520.66 = 85,945.12/x
  3. Step 3: Cross multiply
    288,395.71x = 432,520.66 × 85,945.12
  4. Step 4: Simplify right side
    288,395.71x = 37,173,039,052.31
  5. Step 5: Solve for x
    x = 37,173,039,052.31/288,395.71
  6. Step 6: Final answer
    x = 128,895.95

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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.