Home / 391,417.23-540,155.73-221,684.16

Finding the Fourth Proportional to 391,417.23, 540,155.73 and 221,684.16

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Solution

The fourth proportional to 391,417.23, 540,155.73 and 221,684.16 is: 305,924.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,417.23 : 540,155.73 = 221,684.16 : x
  2. Step 2: Convert to fraction form
    391,417.23/540,155.73 = 221,684.16/x
  3. Step 3: Cross multiply
    391,417.23x = 540,155.73 × 221,684.16
  4. Step 4: Simplify right side
    391,417.23x = 119,743,969,274.24
  5. Step 5: Solve for x
    x = 119,743,969,274.24/391,417.23
  6. Step 6: Final answer
    x = 305,924.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.