Home / 557,103.12-768,849.89-315,428.28

Finding the Fourth Proportional to 557,103.12, 768,849.89 and 315,428.28

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Solution

The fourth proportional to 557,103.12, 768,849.89 and 315,428.28 is: 435,317.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,103.12 : 768,849.89 = 315,428.28 : x
  2. Step 2: Convert to fraction form
    557,103.12/768,849.89 = 315,428.28/x
  3. Step 3: Cross multiply
    557,103.12x = 768,849.89 × 315,428.28
  4. Step 4: Simplify right side
    557,103.12x = 242,516,996,803.75
  5. Step 5: Solve for x
    x = 242,516,996,803.75/557,103.12
  6. Step 6: Final answer
    x = 435,317.97

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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.