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Finding the Fourth Proportional to 642,574.80, 886,758.44 and 356,099.60

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Solution

The fourth proportional to 642,574.80, 886,758.44 and 356,099.60 is: 491,420.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,574.80 : 886,758.44 = 356,099.60 : x
  2. Step 2: Convert to fraction form
    642,574.80/886,758.44 = 356,099.60/x
  3. Step 3: Cross multiply
    642,574.80x = 886,758.44 × 356,099.60
  4. Step 4: Simplify right side
    642,574.80x = 315,774,325,780.62
  5. Step 5: Solve for x
    x = 315,774,325,780.62/642,574.80
  6. Step 6: Final answer
    x = 491,420.34

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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.