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Finding the Fourth Proportional to 261,784.40, 392,561.40 and 103,960.40

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Solution

The fourth proportional to 261,784.40, 392,561.40 and 103,960.40 is: 155,894.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,784.40 : 392,561.40 = 103,960.40 : x
  2. Step 2: Convert to fraction form
    261,784.40/392,561.40 = 103,960.40/x
  3. Step 3: Cross multiply
    261,784.40x = 392,561.40 × 103,960.40
  4. Step 4: Simplify right side
    261,784.40x = 40,810,840,168.56
  5. Step 5: Solve for x
    x = 40,810,840,168.56/261,784.40
  6. Step 6: Final answer
    x = 155,894.85

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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.