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Finding the Fourth Proportional to 873,005.80, 1,309,508.70 and 810,020.20

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Solution

The fourth proportional to 873,005.80, 1,309,508.70 and 810,020.20 is: 1,215,030.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,005.80 : 1,309,508.70 = 810,020.20 : x
  2. Step 2: Convert to fraction form
    873,005.80/1,309,508.70 = 810,020.20/x
  3. Step 3: Cross multiply
    873,005.80x = 1,309,508.70 × 810,020.20
  4. Step 4: Simplify right side
    873,005.80x = 1,060,728,499,075.74
  5. Step 5: Solve for x
    x = 1,060,728,499,075.74/873,005.80
  6. Step 6: Final answer
    x = 1,215,030.30

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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.