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Finding the Fourth Proportional to 499,659.53, 689,569.86 and 318,452.81

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Solution

The fourth proportional to 499,659.53, 689,569.86 and 318,452.81 is: 439,490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,659.53 : 689,569.86 = 318,452.81 : x
  2. Step 2: Convert to fraction form
    499,659.53/689,569.86 = 318,452.81/x
  3. Step 3: Cross multiply
    499,659.53x = 689,569.86 × 318,452.81
  4. Step 4: Simplify right side
    499,659.53x = 219,595,456,160.46
  5. Step 5: Solve for x
    x = 219,595,456,160.46/499,659.53
  6. Step 6: Final answer
    x = 439,490.18

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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.