Home / 1,286,347.76-1,930,678.12-687,820.52

Finding the Fourth Proportional to 1,286,347.76, 1,930,678.12 and 687,820.52

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Solution

The fourth proportional to 1,286,347.76, 1,930,678.12 and 687,820.52 is: 1,032,349.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,347.76 : 1,930,678.12 = 687,820.52 : x
  2. Step 2: Convert to fraction form
    1,286,347.76/1,930,678.12 = 687,820.52/x
  3. Step 3: Cross multiply
    1,286,347.76x = 1,930,678.12 × 687,820.52
  4. Step 4: Simplify right side
    1,286,347.76x = 1,327,960,028,451.02
  5. Step 5: Solve for x
    x = 1,327,960,028,451.02/1,286,347.76
  6. Step 6: Final answer
    x = 1,032,349.16

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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.