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Finding the Fourth Proportional to 618,117.18, 925,972.91 and 455,715.42

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Solution

The fourth proportional to 618,117.18, 925,972.91 and 455,715.42 is: 682,686.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,117.18 : 925,972.91 = 455,715.42 : x
  2. Step 2: Convert to fraction form
    618,117.18/925,972.91 = 455,715.42/x
  3. Step 3: Cross multiply
    618,117.18x = 925,972.91 × 455,715.42
  4. Step 4: Simplify right side
    618,117.18x = 421,980,132,110.63
  5. Step 5: Solve for x
    x = 421,980,132,110.63/618,117.18
  6. Step 6: Final answer
    x = 682,686.31

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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.