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Finding the Fourth Proportional to 261,655.20, 392,920.20 and 173,300.40

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Solution

The fourth proportional to 261,655.20, 392,920.20 and 173,300.40 is: 260,240.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,655.20 : 392,920.20 = 173,300.40 : x
  2. Step 2: Convert to fraction form
    261,655.20/392,920.20 = 173,300.40/x
  3. Step 3: Cross multiply
    261,655.20x = 392,920.20 × 173,300.40
  4. Step 4: Simplify right side
    261,655.20x = 68,093,227,828.08
  5. Step 5: Solve for x
    x = 68,093,227,828.08/261,655.20
  6. Step 6: Final answer
    x = 260,240.30

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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.