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Finding the Fourth Proportional to 261,347.40, 392,021.10 and 161,182.80

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Solution

The fourth proportional to 261,347.40, 392,021.10 and 161,182.80 is: 241,774.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,347.40 : 392,021.10 = 161,182.80 : x
  2. Step 2: Convert to fraction form
    261,347.40/392,021.10 = 161,182.80/x
  3. Step 3: Cross multiply
    261,347.40x = 392,021.10 × 161,182.80
  4. Step 4: Simplify right side
    261,347.40x = 63,187,058,557.08
  5. Step 5: Solve for x
    x = 63,187,058,557.08/261,347.40
  6. Step 6: Final answer
    x = 241,774.20

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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.