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Finding the Fourth Proportional to 261,907.20, 392,860.80 and 74,918.70

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Solution

The fourth proportional to 261,907.20, 392,860.80 and 74,918.70 is: 112,378.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,907.20 : 392,860.80 = 74,918.70 : x
  2. Step 2: Convert to fraction form
    261,907.20/392,860.80 = 74,918.70/x
  3. Step 3: Cross multiply
    261,907.20x = 392,860.80 × 74,918.70
  4. Step 4: Simplify right side
    261,907.20x = 29,432,620,416.96
  5. Step 5: Solve for x
    x = 29,432,620,416.96/261,907.20
  6. Step 6: Final answer
    x = 112,378.05

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1.5x scale

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.