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Finding the Fourth Proportional to 261,588, 392,385.69 and 74,599.50

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Solution

The fourth proportional to 261,588, 392,385.69 and 74,599.50 is: 111,900.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,588 : 392,385.69 = 74,599.50 : x
  2. Step 2: Convert to fraction form
    261,588/392,385.69 = 74,599.50/x
  3. Step 3: Cross multiply
    261,588x = 392,385.69 × 74,599.50
  4. Step 4: Simplify right side
    261,588x = 29,271,776,281.16
  5. Step 5: Solve for x
    x = 29,271,776,281.16/261,588
  6. Step 6: Final answer
    x = 111,900.30

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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.