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Finding the Fourth Proportional to 291,444.48, 399,571.92 and 286,130.88

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Solution

The fourth proportional to 291,444.48, 399,571.92 and 286,130.88 is: 392,286.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,444.48 : 399,571.92 = 286,130.88 : x
  2. Step 2: Convert to fraction form
    291,444.48/399,571.92 = 286,130.88/x
  3. Step 3: Cross multiply
    291,444.48x = 399,571.92 × 286,130.88
  4. Step 4: Simplify right side
    291,444.48x = 114,329,865,092.89
  5. Step 5: Solve for x
    x = 114,329,865,092.89/291,444.48
  6. Step 6: Final answer
    x = 392,286.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.