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Finding the Fourth Proportional to 318,402.47, 439,146.65 and 197,475.95

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Solution

The fourth proportional to 318,402.47, 439,146.65 and 197,475.95 is: 272,362.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,402.47 : 439,146.65 = 197,475.95 : x
  2. Step 2: Convert to fraction form
    318,402.47/439,146.65 = 197,475.95/x
  3. Step 3: Cross multiply
    318,402.47x = 439,146.65 × 197,475.95
  4. Step 4: Simplify right side
    318,402.47x = 86,720,900,196.02
  5. Step 5: Solve for x
    x = 86,720,900,196.02/318,402.47
  6. Step 6: Final answer
    x = 272,362.53

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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.