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Finding the Fourth Proportional to 518,218, 715,319.82 and 303,427.12

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Solution

The fourth proportional to 518,218, 715,319.82 and 303,427.12 is: 418,834.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,218 : 715,319.82 = 303,427.12 : x
  2. Step 2: Convert to fraction form
    518,218/715,319.82 = 303,427.12/x
  3. Step 3: Cross multiply
    518,218x = 715,319.82 × 303,427.12
  4. Step 4: Simplify right side
    518,218x = 217,047,432,861.52
  5. Step 5: Solve for x
    x = 217,047,432,861.52/518,218
  6. Step 6: Final answer
    x = 418,834.22

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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.