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Finding the Fourth Proportional to 805,058.80, 1,206,205.80 and 425,417.20

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Solution

The fourth proportional to 805,058.80, 1,206,205.80 and 425,417.20 is: 637,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,058.80 : 1,206,205.80 = 425,417.20 : x
  2. Step 2: Convert to fraction form
    805,058.80/1,206,205.80 = 425,417.20/x
  3. Step 3: Cross multiply
    805,058.80x = 1,206,205.80 × 425,417.20
  4. Step 4: Simplify right side
    805,058.80x = 513,140,694,059.76
  5. Step 5: Solve for x
    x = 513,140,694,059.76/805,058.80
  6. Step 6: Final answer
    x = 637,395.30

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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.