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Finding the Fourth Proportional to 318,953.79, 478,434.33 and 136,560.02

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Solution

The fourth proportional to 318,953.79, 478,434.33 and 136,560.02 is: 204,841.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,953.79 : 478,434.33 = 136,560.02 : x
  2. Step 2: Convert to fraction form
    318,953.79/478,434.33 = 136,560.02/x
  3. Step 3: Cross multiply
    318,953.79x = 478,434.33 × 136,560.02
  4. Step 4: Simplify right side
    318,953.79x = 65,334,999,281.32
  5. Step 5: Solve for x
    x = 65,334,999,281.32/318,953.79
  6. Step 6: Final answer
    x = 204,841.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.