Home / 648,082.10-972,123.15-487,118.90

Finding the Fourth Proportional to 648,082.10, 972,123.15 and 487,118.90

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Solution

The fourth proportional to 648,082.10, 972,123.15 and 487,118.90 is: 730,678.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,082.10 : 972,123.15 = 487,118.90 : x
  2. Step 2: Convert to fraction form
    648,082.10/972,123.15 = 487,118.90/x
  3. Step 3: Cross multiply
    648,082.10x = 972,123.15 × 487,118.90
  4. Step 4: Simplify right side
    648,082.10x = 473,539,559,492.54
  5. Step 5: Solve for x
    x = 473,539,559,492.54/648,082.10
  6. Step 6: Final answer
    x = 730,678.35

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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.