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Finding the Fourth Proportional to 875,139.80, 1,313,000.90 and 314,218.20

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Solution

The fourth proportional to 875,139.80, 1,313,000.90 and 314,218.20 is: 471,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,139.80 : 1,313,000.90 = 314,218.20 : x
  2. Step 2: Convert to fraction form
    875,139.80/1,313,000.90 = 314,218.20/x
  3. Step 3: Cross multiply
    875,139.80x = 1,313,000.90 × 314,218.20
  4. Step 4: Simplify right side
    875,139.80x = 412,568,779,396.38
  5. Step 5: Solve for x
    x = 412,568,779,396.38/875,139.80
  6. Step 6: Final answer
    x = 471,431.86

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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.