Home / 820,230.80-1,229,424.60-420,717.20

Finding the Fourth Proportional to 820,230.80, 1,229,424.60 and 420,717.20

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Solution

The fourth proportional to 820,230.80, 1,229,424.60 and 420,717.20 is: 630,603.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,230.80 : 1,229,424.60 = 420,717.20 : x
  2. Step 2: Convert to fraction form
    820,230.80/1,229,424.60 = 420,717.20/x
  3. Step 3: Cross multiply
    820,230.80x = 1,229,424.60 × 420,717.20
  4. Step 4: Simplify right side
    820,230.80x = 517,240,075,323.12
  5. Step 5: Solve for x
    x = 517,240,075,323.12/820,230.80
  6. Step 6: Final answer
    x = 630,603.09

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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.