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Finding the Fourth Proportional to 381,289.95, 571,809.55 and 128,502.32

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Solution

The fourth proportional to 381,289.95, 571,809.55 and 128,502.32 is: 192,711.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,289.95 : 571,809.55 = 128,502.32 : x
  2. Step 2: Convert to fraction form
    381,289.95/571,809.55 = 128,502.32/x
  3. Step 3: Cross multiply
    381,289.95x = 571,809.55 × 128,502.32
  4. Step 4: Simplify right side
    381,289.95x = 73,478,853,773.16
  5. Step 5: Solve for x
    x = 73,478,853,773.16/381,289.95
  6. Step 6: Final answer
    x = 192,711.23

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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.