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Finding the Fourth Proportional to 487,920.80, 731,881.20 and 251,184.80

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Solution

The fourth proportional to 487,920.80, 731,881.20 and 251,184.80 is: 376,777.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,920.80 : 731,881.20 = 251,184.80 : x
  2. Step 2: Convert to fraction form
    487,920.80/731,881.20 = 251,184.80/x
  3. Step 3: Cross multiply
    487,920.80x = 731,881.20 × 251,184.80
  4. Step 4: Simplify right side
    487,920.80x = 183,837,432,845.76
  5. Step 5: Solve for x
    x = 183,837,432,845.76/487,920.80
  6. Step 6: Final answer
    x = 376,777.20

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Similar ratio
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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.