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Finding the Fourth Proportional to 458,260.80, 687,391.20 and 308,572.80

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Solution

The fourth proportional to 458,260.80, 687,391.20 and 308,572.80 is: 462,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,260.80 : 687,391.20 = 308,572.80 : x
  2. Step 2: Convert to fraction form
    458,260.80/687,391.20 = 308,572.80/x
  3. Step 3: Cross multiply
    458,260.80x = 687,391.20 × 308,572.80
  4. Step 4: Simplify right side
    458,260.80x = 212,110,227,279.36
  5. Step 5: Solve for x
    x = 212,110,227,279.36/458,260.80
  6. Step 6: Final answer
    x = 462,859.20

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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.