Home / 651,541.12-977,324.64-428,325.28

Finding the Fourth Proportional to 651,541.12, 977,324.64 and 428,325.28

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Solution

The fourth proportional to 651,541.12, 977,324.64 and 428,325.28 is: 642,496.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,541.12 : 977,324.64 = 428,325.28 : x
  2. Step 2: Convert to fraction form
    651,541.12/977,324.64 = 428,325.28/x
  3. Step 3: Cross multiply
    651,541.12x = 977,324.64 × 428,325.28
  4. Step 4: Simplify right side
    651,541.12x = 418,612,850,078.90
  5. Step 5: Solve for x
    x = 418,612,850,078.90/651,541.12
  6. Step 6: Final answer
    x = 642,496.44

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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.