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Finding the Fourth Proportional to 513,690.96, 708,845.28 and 347,781.45

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Solution

The fourth proportional to 513,690.96, 708,845.28 and 347,781.45 is: 479,905.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,690.96 : 708,845.28 = 347,781.45 : x
  2. Step 2: Convert to fraction form
    513,690.96/708,845.28 = 347,781.45/x
  3. Step 3: Cross multiply
    513,690.96x = 708,845.28 × 347,781.45
  4. Step 4: Simplify right side
    513,690.96x = 246,523,236,670.79
  5. Step 5: Solve for x
    x = 246,523,236,670.79/513,690.96
  6. Step 6: Final answer
    x = 479,905.73

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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.