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Finding the Fourth Proportional to 261,946.80, 392,920.20 and 222,580.80

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Solution

The fourth proportional to 261,946.80, 392,920.20 and 222,580.80 is: 333,871.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,946.80 : 392,920.20 = 222,580.80 : x
  2. Step 2: Convert to fraction form
    261,946.80/392,920.20 = 222,580.80/x
  3. Step 3: Cross multiply
    261,946.80x = 392,920.20 × 222,580.80
  4. Step 4: Simplify right side
    261,946.80x = 87,456,492,452.16
  5. Step 5: Solve for x
    x = 87,456,492,452.16/261,946.80
  6. Step 6: Final answer
    x = 333,871.20

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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.