Home / 651,424.10-977,136.15-427,475.30

Finding the Fourth Proportional to 651,424.10, 977,136.15 and 427,475.30

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Solution

The fourth proportional to 651,424.10, 977,136.15 and 427,475.30 is: 641,212.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,424.10 : 977,136.15 = 427,475.30 : x
  2. Step 2: Convert to fraction form
    651,424.10/977,136.15 = 427,475.30/x
  3. Step 3: Cross multiply
    651,424.10x = 977,136.15 × 427,475.30
  4. Step 4: Simplify right side
    651,424.10x = 417,701,568,862.10
  5. Step 5: Solve for x
    x = 417,701,568,862.10/651,424.10
  6. Step 6: Final answer
    x = 641,212.95

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Half scale
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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.