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Finding the Fourth Proportional to 642,571.32, 886,671.18 and 356,094.84

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Solution

The fourth proportional to 642,571.32, 886,671.18 and 356,094.84 is: 491,368.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,571.32 : 886,671.18 = 356,094.84 : x
  2. Step 2: Convert to fraction form
    642,571.32/886,671.18 = 356,094.84/x
  3. Step 3: Cross multiply
    642,571.32x = 886,671.18 × 356,094.84
  4. Step 4: Simplify right side
    642,571.32x = 315,739,031,974.71
  5. Step 5: Solve for x
    x = 315,739,031,974.71/642,571.32
  6. Step 6: Final answer
    x = 491,368.07

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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.