Home / 918,255.60-1,377,383.40-386,377.20

Finding the Fourth Proportional to 918,255.60, 1,377,383.40 and 386,377.20

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Solution

The fourth proportional to 918,255.60, 1,377,383.40 and 386,377.20 is: 579,565.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,255.60 : 1,377,383.40 = 386,377.20 : x
  2. Step 2: Convert to fraction form
    918,255.60/1,377,383.40 = 386,377.20/x
  3. Step 3: Cross multiply
    918,255.60x = 1,377,383.40 × 386,377.20
  4. Step 4: Simplify right side
    918,255.60x = 532,189,541,418.48
  5. Step 5: Solve for x
    x = 532,189,541,418.48/918,255.60
  6. Step 6: Final answer
    x = 579,565.80

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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.