Home / 686,719.80-1,029,869.10-474,849.12

Finding the Fourth Proportional to 686,719.80, 1,029,869.10 and 474,849.12

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Solution

The fourth proportional to 686,719.80, 1,029,869.10 and 474,849.12 is: 712,128.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,719.80 : 1,029,869.10 = 474,849.12 : x
  2. Step 2: Convert to fraction form
    686,719.80/1,029,869.10 = 474,849.12/x
  3. Step 3: Cross multiply
    686,719.80x = 1,029,869.10 × 474,849.12
  4. Step 4: Simplify right side
    686,719.80x = 489,032,435,850.19
  5. Step 5: Solve for x
    x = 489,032,435,850.19/686,719.80
  6. Step 6: Final answer
    x = 712,128.06

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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.