Home / 261,210.14-391,312.19-221,669.18

Finding the Fourth Proportional to 261,210.14, 391,312.19 and 221,669.18

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Solution

The fourth proportional to 261,210.14, 391,312.19 and 221,669.18 is: 332,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,210.14 : 391,312.19 = 221,669.18 : x
  2. Step 2: Convert to fraction form
    261,210.14/391,312.19 = 221,669.18/x
  3. Step 3: Cross multiply
    261,210.14x = 391,312.19 × 221,669.18
  4. Step 4: Simplify right side
    261,210.14x = 86,741,852,281.30
  5. Step 5: Solve for x
    x = 86,741,852,281.30/261,210.14
  6. Step 6: Final answer
    x = 332,076.90

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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.