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Finding the Fourth Proportional to 518,318.42, 715,034.86 and 303,325.38

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Solution

The fourth proportional to 518,318.42, 715,034.86 and 303,325.38 is: 418,445.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,318.42 : 715,034.86 = 303,325.38 : x
  2. Step 2: Convert to fraction form
    518,318.42/715,034.86 = 303,325.38/x
  3. Step 3: Cross multiply
    518,318.42x = 715,034.86 × 303,325.38
  4. Step 4: Simplify right side
    518,318.42x = 216,888,219,864.43
  5. Step 5: Solve for x
    x = 216,888,219,864.43/518,318.42
  6. Step 6: Final answer
    x = 418,445.91

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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.