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Finding the Fourth Proportional to 768,672.30, 1,153,008.45 and 488,736.30

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Solution

The fourth proportional to 768,672.30, 1,153,008.45 and 488,736.30 is: 733,104.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,672.30 : 1,153,008.45 = 488,736.30 : x
  2. Step 2: Convert to fraction form
    768,672.30/1,153,008.45 = 488,736.30/x
  3. Step 3: Cross multiply
    768,672.30x = 1,153,008.45 × 488,736.30
  4. Step 4: Simplify right side
    768,672.30x = 563,517,083,721.74
  5. Step 5: Solve for x
    x = 563,517,083,721.74/768,672.30
  6. Step 6: Final answer
    x = 733,104.45

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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.