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Finding the Fourth Proportional to 318,345.93, 439,068.42 and 197,418.87

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Solution

The fourth proportional to 318,345.93, 439,068.42 and 197,418.87 is: 272,283.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,345.93 : 439,068.42 = 197,418.87 : x
  2. Step 2: Convert to fraction form
    318,345.93/439,068.42 = 197,418.87/x
  3. Step 3: Cross multiply
    318,345.93x = 439,068.42 × 197,418.87
  4. Step 4: Simplify right side
    318,345.93x = 86,680,391,329.09
  5. Step 5: Solve for x
    x = 86,680,391,329.09/318,345.93
  6. Step 6: Final answer
    x = 272,283.65

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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.