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Finding the Fourth Proportional to 819,782.10, 1,229,017.05 and 346,077.90

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Solution

The fourth proportional to 819,782.10, 1,229,017.05 and 346,077.90 is: 518,839.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,782.10 : 1,229,017.05 = 346,077.90 : x
  2. Step 2: Convert to fraction form
    819,782.10/1,229,017.05 = 346,077.90/x
  3. Step 3: Cross multiply
    819,782.10x = 1,229,017.05 × 346,077.90
  4. Step 4: Simplify right side
    819,782.10x = 425,335,639,728.20
  5. Step 5: Solve for x
    x = 425,335,639,728.20/819,782.10
  6. Step 6: Final answer
    x = 518,839.87

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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.