Home / 687,901.20-1,031,851.80-519,939.60

Finding the Fourth Proportional to 687,901.20, 1,031,851.80 and 519,939.60

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Solution

The fourth proportional to 687,901.20, 1,031,851.80 and 519,939.60 is: 779,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,901.20 : 1,031,851.80 = 519,939.60 : x
  2. Step 2: Convert to fraction form
    687,901.20/1,031,851.80 = 519,939.60/x
  3. Step 3: Cross multiply
    687,901.20x = 1,031,851.80 × 519,939.60
  4. Step 4: Simplify right side
    687,901.20x = 536,500,612,151.28
  5. Step 5: Solve for x
    x = 536,500,612,151.28/687,901.20
  6. Step 6: Final answer
    x = 779,909.40

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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.