Home / 739,447.96-1,020,438.18-399,916.20

Finding the Fourth Proportional to 739,447.96, 1,020,438.18 and 399,916.20

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Solution

The fourth proportional to 739,447.96, 1,020,438.18 and 399,916.20 is: 551,884.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,447.96 : 1,020,438.18 = 399,916.20 : x
  2. Step 2: Convert to fraction form
    739,447.96/1,020,438.18 = 399,916.20/x
  3. Step 3: Cross multiply
    739,447.96x = 1,020,438.18 × 399,916.20
  4. Step 4: Simplify right side
    739,447.96x = 408,089,759,280.52
  5. Step 5: Solve for x
    x = 408,089,759,280.52/739,447.96
  6. Step 6: Final answer
    x = 551,884.35

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Double scale
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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.