Home / 739,470.42-1,020,469.86-399,938.67

Finding the Fourth Proportional to 739,470.42, 1,020,469.86 and 399,938.67

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Solution

The fourth proportional to 739,470.42, 1,020,469.86 and 399,938.67 is: 551,915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,470.42 : 1,020,469.86 = 399,938.67 : x
  2. Step 2: Convert to fraction form
    739,470.42/1,020,469.86 = 399,938.67/x
  3. Step 3: Cross multiply
    739,470.42x = 1,020,469.86 × 399,938.67
  4. Step 4: Simplify right side
    739,470.42x = 408,125,358,583.49
  5. Step 5: Solve for x
    x = 408,125,358,583.49/739,470.42
  6. Step 6: Final answer
    x = 551,915.73

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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.