Home / 687,174.84-1,031,165.64-287,784.90

Finding the Fourth Proportional to 687,174.84, 1,031,165.64 and 287,784.90

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Solution

The fourth proportional to 687,174.84, 1,031,165.64 and 287,784.90 is: 431,846.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,174.84 : 1,031,165.64 = 287,784.90 : x
  2. Step 2: Convert to fraction form
    687,174.84/1,031,165.64 = 287,784.90/x
  3. Step 3: Cross multiply
    687,174.84x = 1,031,165.64 × 287,784.90
  4. Step 4: Simplify right side
    687,174.84x = 296,753,900,590.84
  5. Step 5: Solve for x
    x = 296,753,900,590.84/687,174.84
  6. Step 6: Final answer
    x = 431,846.28

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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.