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Finding the Fourth Proportional to 518,193.68, 715,158.28 and 303,320.72

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Solution

The fourth proportional to 518,193.68, 715,158.28 and 303,320.72 is: 418,612.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,193.68 : 715,158.28 = 303,320.72 : x
  2. Step 2: Convert to fraction form
    518,193.68/715,158.28 = 303,320.72/x
  3. Step 3: Cross multiply
    518,193.68x = 715,158.28 × 303,320.72
  4. Step 4: Simplify right side
    518,193.68x = 216,922,324,403.56
  5. Step 5: Solve for x
    x = 216,922,324,403.56/518,193.68
  6. Step 6: Final answer
    x = 418,612.45

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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.