Home / 739,478.77-1,020,480.78-399,947.02

Finding the Fourth Proportional to 739,478.77, 1,020,480.78 and 399,947.02

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Solution

The fourth proportional to 739,478.77, 1,020,480.78 and 399,947.02 is: 551,926.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,478.77 : 1,020,480.78 = 399,947.02 : x
  2. Step 2: Convert to fraction form
    739,478.77/1,020,480.78 = 399,947.02/x
  3. Step 3: Cross multiply
    739,478.77x = 1,020,480.78 × 399,947.02
  4. Step 4: Simplify right side
    739,478.77x = 408,138,239,826.14
  5. Step 5: Solve for x
    x = 408,138,239,826.14/739,478.77
  6. Step 6: Final answer
    x = 551,926.92

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Double scale
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Similar ratio
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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.