Home / 738,543.78-1,019,191.14-399,012.30

Finding the Fourth Proportional to 738,543.78, 1,019,191.14 and 399,012.30

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Solution

The fourth proportional to 738,543.78, 1,019,191.14 and 399,012.30 is: 550,637.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,543.78 : 1,019,191.14 = 399,012.30 : x
  2. Step 2: Convert to fraction form
    738,543.78/1,019,191.14 = 399,012.30/x
  3. Step 3: Cross multiply
    738,543.78x = 1,019,191.14 × 399,012.30
  4. Step 4: Simplify right side
    738,543.78x = 406,669,800,911.02
  5. Step 5: Solve for x
    x = 406,669,800,911.02/738,543.78
  6. Step 6: Final answer
    x = 550,637.36

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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.