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Finding the Fourth Proportional to 387,726.80, 581,686.20 and 177,320.40

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Solution

The fourth proportional to 387,726.80, 581,686.20 and 177,320.40 is: 266,024.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,726.80 : 581,686.20 = 177,320.40 : x
  2. Step 2: Convert to fraction form
    387,726.80/581,686.20 = 177,320.40/x
  3. Step 3: Cross multiply
    387,726.80x = 581,686.20 × 177,320.40
  4. Step 4: Simplify right side
    387,726.80x = 103,144,829,658.48
  5. Step 5: Solve for x
    x = 103,144,829,658.48/387,726.80
  6. Step 6: Final answer
    x = 266,024.50

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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.