Home / 738,987.90-1,019,802.84-399,456.15

Finding the Fourth Proportional to 738,987.90, 1,019,802.84 and 399,456.15

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Solution

The fourth proportional to 738,987.90, 1,019,802.84 and 399,456.15 is: 551,249.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,987.90 : 1,019,802.84 = 399,456.15 : x
  2. Step 2: Convert to fraction form
    738,987.90/1,019,802.84 = 399,456.15/x
  3. Step 3: Cross multiply
    738,987.90x = 1,019,802.84 × 399,456.15
  4. Step 4: Simplify right side
    738,987.90x = 407,366,516,225.47
  5. Step 5: Solve for x
    x = 407,366,516,225.47/738,987.90
  6. Step 6: Final answer
    x = 551,249.24

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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.