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Finding the Fourth Proportional to 643,127.42, 887,510.84 and 356,648.24

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Solution

The fourth proportional to 643,127.42, 887,510.84 and 356,648.24 is: 492,171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,127.42 : 887,510.84 = 356,648.24 : x
  2. Step 2: Convert to fraction form
    643,127.42/887,510.84 = 356,648.24/x
  3. Step 3: Cross multiply
    643,127.42x = 887,510.84 × 356,648.24
  4. Step 4: Simplify right side
    643,127.42x = 316,529,179,066.92
  5. Step 5: Solve for x
    x = 316,529,179,066.92/643,127.42
  6. Step 6: Final answer
    x = 492,171.80

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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.