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Finding the Fourth Proportional to 779,818.80, 1,169,728.20 and 442,729.20

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Solution

The fourth proportional to 779,818.80, 1,169,728.20 and 442,729.20 is: 664,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,818.80 : 1,169,728.20 = 442,729.20 : x
  2. Step 2: Convert to fraction form
    779,818.80/1,169,728.20 = 442,729.20/x
  3. Step 3: Cross multiply
    779,818.80x = 1,169,728.20 × 442,729.20
  4. Step 4: Simplify right side
    779,818.80x = 517,872,830,203.44
  5. Step 5: Solve for x
    x = 517,872,830,203.44/779,818.80
  6. Step 6: Final answer
    x = 664,093.80

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Double scale
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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.