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Finding the Fourth Proportional to 408,079.40, 611,681.70 and 155,262.20

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Solution

The fourth proportional to 408,079.40, 611,681.70 and 155,262.20 is: 232,726.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,079.40 : 611,681.70 = 155,262.20 : x
  2. Step 2: Convert to fraction form
    408,079.40/611,681.70 = 155,262.20/x
  3. Step 3: Cross multiply
    408,079.40x = 611,681.70 × 155,262.20
  4. Step 4: Simplify right side
    408,079.40x = 94,971,046,441.74
  5. Step 5: Solve for x
    x = 94,971,046,441.74/408,079.40
  6. Step 6: Final answer
    x = 232,726.88

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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.