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Finding the Fourth Proportional to 478,459.86, 660,321.30 and 357,391.14

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Solution

The fourth proportional to 478,459.86, 660,321.30 and 357,391.14 is: 493,234.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,459.86 : 660,321.30 = 357,391.14 : x
  2. Step 2: Convert to fraction form
    478,459.86/660,321.30 = 357,391.14/x
  3. Step 3: Cross multiply
    478,459.86x = 660,321.30 × 357,391.14
  4. Step 4: Simplify right side
    478,459.86x = 235,992,982,173.28
  5. Step 5: Solve for x
    x = 235,992,982,173.28/478,459.86
  6. Step 6: Final answer
    x = 493,234.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.