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Finding the Fourth Proportional to 520,379.80, 717,861.12 and 348,304.96

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Solution

The fourth proportional to 520,379.80, 717,861.12 and 348,304.96 is: 480,484.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,379.80 : 717,861.12 = 348,304.96 : x
  2. Step 2: Convert to fraction form
    520,379.80/717,861.12 = 348,304.96/x
  3. Step 3: Cross multiply
    520,379.80x = 717,861.12 × 348,304.96
  4. Step 4: Simplify right side
    520,379.80x = 250,034,588,687.16
  5. Step 5: Solve for x
    x = 250,034,588,687.16/520,379.80
  6. Step 6: Final answer
    x = 480,484.81

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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.