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Finding the Fourth Proportional to 805,062.80, 1,206,211.80 and 425,421.20

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Solution

The fourth proportional to 805,062.80, 1,206,211.80 and 425,421.20 is: 637,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,062.80 : 1,206,211.80 = 425,421.20 : x
  2. Step 2: Convert to fraction form
    805,062.80/1,206,211.80 = 425,421.20/x
  3. Step 3: Cross multiply
    805,062.80x = 1,206,211.80 × 425,421.20
  4. Step 4: Simplify right side
    805,062.80x = 513,148,071,410.16
  5. Step 5: Solve for x
    x = 513,148,071,410.16/805,062.80
  6. Step 6: Final answer
    x = 637,401.30

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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.