Home / 679,991.90-1,019,987.85-409,387.10

Finding the Fourth Proportional to 679,991.90, 1,019,987.85 and 409,387.10

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Solution

The fourth proportional to 679,991.90, 1,019,987.85 and 409,387.10 is: 614,080.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,991.90 : 1,019,987.85 = 409,387.10 : x
  2. Step 2: Convert to fraction form
    679,991.90/1,019,987.85 = 409,387.10/x
  3. Step 3: Cross multiply
    679,991.90x = 1,019,987.85 × 409,387.10
  4. Step 4: Simplify right side
    679,991.90x = 417,569,867,946.74
  5. Step 5: Solve for x
    x = 417,569,867,946.74/679,991.90
  6. Step 6: Final answer
    x = 614,080.65

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.