Home / 649,819.02-974,728.53-428,151.18

Finding the Fourth Proportional to 649,819.02, 974,728.53 and 428,151.18

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Solution

The fourth proportional to 649,819.02, 974,728.53 and 428,151.18 is: 642,226.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,819.02 : 974,728.53 = 428,151.18 : x
  2. Step 2: Convert to fraction form
    649,819.02/974,728.53 = 428,151.18/x
  3. Step 3: Cross multiply
    649,819.02x = 974,728.53 × 428,151.18
  4. Step 4: Simplify right side
    649,819.02x = 417,331,170,299.17
  5. Step 5: Solve for x
    x = 417,331,170,299.17/649,819.02
  6. Step 6: Final answer
    x = 642,226.77

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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.