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Finding the Fourth Proportional to 709,817.10, 979,989.75 and 451,839.66

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Solution

The fourth proportional to 709,817.10, 979,989.75 and 451,839.66 is: 623,820.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,817.10 : 979,989.75 = 451,839.66 : x
  2. Step 2: Convert to fraction form
    709,817.10/979,989.75 = 451,839.66/x
  3. Step 3: Cross multiply
    709,817.10x = 979,989.75 × 451,839.66
  4. Step 4: Simplify right side
    709,817.10x = 442,798,235,443.49
  5. Step 5: Solve for x
    x = 442,798,235,443.49/709,817.10
  6. Step 6: Final answer
    x = 623,820.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.