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Finding the Fourth Proportional to 557,855.08, 769,857.18 and 316,131.40

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Solution

The fourth proportional to 557,855.08, 769,857.18 and 316,131.40 is: 436,271.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,855.08 : 769,857.18 = 316,131.40 : x
  2. Step 2: Convert to fraction form
    557,855.08/769,857.18 = 316,131.40/x
  3. Step 3: Cross multiply
    557,855.08x = 769,857.18 × 316,131.40
  4. Step 4: Simplify right side
    557,855.08x = 243,376,028,113.45
  5. Step 5: Solve for x
    x = 243,376,028,113.45/557,855.08
  6. Step 6: Final answer
    x = 436,271.06

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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.