Home / 651,439.20-977,158.80-208,207.20

Finding the Fourth Proportional to 651,439.20, 977,158.80 and 208,207.20

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Solution

The fourth proportional to 651,439.20, 977,158.80 and 208,207.20 is: 312,310.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,439.20 : 977,158.80 = 208,207.20 : x
  2. Step 2: Convert to fraction form
    651,439.20/977,158.80 = 208,207.20/x
  3. Step 3: Cross multiply
    651,439.20x = 977,158.80 × 208,207.20
  4. Step 4: Simplify right side
    651,439.20x = 203,451,497,703.36
  5. Step 5: Solve for x
    x = 203,451,497,703.36/651,439.20
  6. Step 6: Final answer
    x = 312,310.80

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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.