Home / 739,403.05-1,020,379.28-399,871.30

Finding the Fourth Proportional to 739,403.05, 1,020,379.28 and 399,871.30

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Solution

The fourth proportional to 739,403.05, 1,020,379.28 and 399,871.30 is: 551,824.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,403.05 : 1,020,379.28 = 399,871.30 : x
  2. Step 2: Convert to fraction form
    739,403.05/1,020,379.28 = 399,871.30/x
  3. Step 3: Cross multiply
    739,403.05x = 1,020,379.28 × 399,871.30
  4. Step 4: Simplify right side
    739,403.05x = 408,020,389,186.66
  5. Step 5: Solve for x
    x = 408,020,389,186.66/739,403.05
  6. Step 6: Final answer
    x = 551,824.05

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Double scale
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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.