Home / 738,990.40-1,019,806.29-399,458.65

Finding the Fourth Proportional to 738,990.40, 1,019,806.29 and 399,458.65

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Solution

The fourth proportional to 738,990.40, 1,019,806.29 and 399,458.65 is: 551,252.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,990.40 : 1,019,806.29 = 399,458.65 : x
  2. Step 2: Convert to fraction form
    738,990.40/1,019,806.29 = 399,458.65/x
  3. Step 3: Cross multiply
    738,990.40x = 1,019,806.29 × 399,458.65
  4. Step 4: Simplify right side
    738,990.40x = 407,370,443,864.91
  5. Step 5: Solve for x
    x = 407,370,443,864.91/738,990.40
  6. Step 6: Final answer
    x = 551,252.69

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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.