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Finding the Fourth Proportional to 261,343.75, 392,015.58 and 74,355.25

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Solution

The fourth proportional to 261,343.75, 392,015.58 and 74,355.25 is: 111,532.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,343.75 : 392,015.58 = 74,355.25 : x
  2. Step 2: Convert to fraction form
    261,343.75/392,015.58 = 74,355.25/x
  3. Step 3: Cross multiply
    261,343.75x = 392,015.58 × 74,355.25
  4. Step 4: Simplify right side
    261,343.75x = 29,148,416,454.80
  5. Step 5: Solve for x
    x = 29,148,416,454.80/261,343.75
  6. Step 6: Final answer
    x = 111,532.86

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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.