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Finding the Fourth Proportional to 557,346.80, 836,020.20 and 389,385.20

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Solution

The fourth proportional to 557,346.80, 836,020.20 and 389,385.20 is: 584,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,346.80 : 836,020.20 = 389,385.20 : x
  2. Step 2: Convert to fraction form
    557,346.80/836,020.20 = 389,385.20/x
  3. Step 3: Cross multiply
    557,346.80x = 836,020.20 × 389,385.20
  4. Step 4: Simplify right side
    557,346.80x = 325,533,892,781.04
  5. Step 5: Solve for x
    x = 325,533,892,781.04/557,346.80
  6. Step 6: Final answer
    x = 584,077.80

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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.