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Finding the Fourth Proportional to 518,318.70, 715,035.27 and 303,325.74

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Solution

The fourth proportional to 518,318.70, 715,035.27 and 303,325.74 is: 418,446.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,318.70 : 715,035.27 = 303,325.74 : x
  2. Step 2: Convert to fraction form
    518,318.70/715,035.27 = 303,325.74/x
  3. Step 3: Cross multiply
    518,318.70x = 715,035.27 × 303,325.74
  4. Step 4: Simplify right side
    518,318.70x = 216,888,602,398.85
  5. Step 5: Solve for x
    x = 216,888,602,398.85/518,318.70
  6. Step 6: Final answer
    x = 418,446.42

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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.