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Finding the Fourth Proportional to 709,662.80, 1,065,271.80 and 443,723.60

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Solution

The fourth proportional to 709,662.80, 1,065,271.80 and 443,723.60 is: 666,071.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,662.80 : 1,065,271.80 = 443,723.60 : x
  2. Step 2: Convert to fraction form
    709,662.80/1,065,271.80 = 443,723.60/x
  3. Step 3: Cross multiply
    709,662.80x = 1,065,271.80 × 443,723.60
  4. Step 4: Simplify right side
    709,662.80x = 472,686,238,074.48
  5. Step 5: Solve for x
    x = 472,686,238,074.48/709,662.80
  6. Step 6: Final answer
    x = 666,071.60

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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.