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Finding the Fourth Proportional to 391,574.82, 540,340.25 and 217,150.04

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Solution

The fourth proportional to 391,574.82, 540,340.25 and 217,150.04 is: 299,648.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,574.82 : 540,340.25 = 217,150.04 : x
  2. Step 2: Convert to fraction form
    391,574.82/540,340.25 = 217,150.04/x
  3. Step 3: Cross multiply
    391,574.82x = 540,340.25 × 217,150.04
  4. Step 4: Simplify right side
    391,574.82x = 117,334,903,113.66
  5. Step 5: Solve for x
    x = 117,334,903,113.66/391,574.82
  6. Step 6: Final answer
    x = 299,648.74

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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.