Home / 739,505.90-1,020,518.39-399,974.15

Finding the Fourth Proportional to 739,505.90, 1,020,518.39 and 399,974.15

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Solution

The fourth proportional to 739,505.90, 1,020,518.39 and 399,974.15 is: 551,964.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,505.90 : 1,020,518.39 = 399,974.15 : x
  2. Step 2: Convert to fraction form
    739,505.90/1,020,518.39 = 399,974.15/x
  3. Step 3: Cross multiply
    739,505.90x = 1,020,518.39 × 399,974.15
  4. Step 4: Simplify right side
    739,505.90x = 408,180,979,150.85
  5. Step 5: Solve for x
    x = 408,180,979,150.85/739,505.90
  6. Step 6: Final answer
    x = 551,964.46

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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.