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Finding the Fourth Proportional to 642,586.16, 886,804.20 and 356,100.10

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Solution

The fourth proportional to 642,586.16, 886,804.20 and 356,100.10 is: 491,437.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,586.16 : 886,804.20 = 356,100.10 : x
  2. Step 2: Convert to fraction form
    642,586.16/886,804.20 = 356,100.10/x
  3. Step 3: Cross multiply
    642,586.16x = 886,804.20 × 356,100.10
  4. Step 4: Simplify right side
    642,586.16x = 315,791,062,083.41
  5. Step 5: Solve for x
    x = 315,791,062,083.41/642,586.16
  6. Step 6: Final answer
    x = 491,437.69

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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.