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Finding the Fourth Proportional to 557,061.16, 768,663.30 and 318,551.08

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Solution

The fourth proportional to 557,061.16, 768,663.30 and 318,551.08 is: 439,554.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,061.16 : 768,663.30 = 318,551.08 : x
  2. Step 2: Convert to fraction form
    557,061.16/768,663.30 = 318,551.08/x
  3. Step 3: Cross multiply
    557,061.16x = 768,663.30 × 318,551.08
  4. Step 4: Simplify right side
    557,061.16x = 244,858,524,371.36
  5. Step 5: Solve for x
    x = 244,858,524,371.36/557,061.16
  6. Step 6: Final answer
    x = 439,554.11

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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.