Home / 918,078.60-1,377,117.90-386,200.20

Finding the Fourth Proportional to 918,078.60, 1,377,117.90 and 386,200.20

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Solution

The fourth proportional to 918,078.60, 1,377,117.90 and 386,200.20 is: 579,300.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,078.60 : 1,377,117.90 = 386,200.20 : x
  2. Step 2: Convert to fraction form
    918,078.60/1,377,117.90 = 386,200.20/x
  3. Step 3: Cross multiply
    918,078.60x = 1,377,117.90 × 386,200.20
  4. Step 4: Simplify right side
    918,078.60x = 531,843,208,403.58
  5. Step 5: Solve for x
    x = 531,843,208,403.58/918,078.60
  6. Step 6: Final answer
    x = 579,300.30

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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.