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Finding the Fourth Proportional to 261,478.17, 392,222.70 and 74,489.67

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Solution

The fourth proportional to 261,478.17, 392,222.70 and 74,489.67 is: 111,736.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,478.17 : 392,222.70 = 74,489.67 : x
  2. Step 2: Convert to fraction form
    261,478.17/392,222.70 = 74,489.67/x
  3. Step 3: Cross multiply
    261,478.17x = 392,222.70 × 74,489.67
  4. Step 4: Simplify right side
    261,478.17x = 29,216,539,489.51
  5. Step 5: Solve for x
    x = 29,216,539,489.51/261,478.17
  6. Step 6: Final answer
    x = 111,736.06

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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.