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Finding the Fourth Proportional to 261,045.20, 391,567.80 and 245,493.20

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Solution

The fourth proportional to 261,045.20, 391,567.80 and 245,493.20 is: 368,239.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,045.20 : 391,567.80 = 245,493.20 : x
  2. Step 2: Convert to fraction form
    261,045.20/391,567.80 = 245,493.20/x
  3. Step 3: Cross multiply
    261,045.20x = 391,567.80 × 245,493.20
  4. Step 4: Simplify right side
    261,045.20x = 96,127,232,238.96
  5. Step 5: Solve for x
    x = 96,127,232,238.96/261,045.20
  6. Step 6: Final answer
    x = 368,239.80

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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.