Home / 918,439.90-1,377,331.80-319,420.60

Finding the Fourth Proportional to 918,439.90, 1,377,331.80 and 319,420.60

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Solution

The fourth proportional to 918,439.90, 1,377,331.80 and 319,420.60 is: 479,016.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,439.90 : 1,377,331.80 = 319,420.60 : x
  2. Step 2: Convert to fraction form
    918,439.90/1,377,331.80 = 319,420.60/x
  3. Step 3: Cross multiply
    918,439.90x = 1,377,331.80 × 319,420.60
  4. Step 4: Simplify right side
    918,439.90x = 439,948,149,955.08
  5. Step 5: Solve for x
    x = 439,948,149,955.08/918,439.90
  6. Step 6: Final answer
    x = 479,016.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.