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Finding the Fourth Proportional to 289,320.34, 399,169.81 and 187,423.91

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Solution

The fourth proportional to 289,320.34, 399,169.81 and 187,423.91 is: 258,585.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,320.34 : 399,169.81 = 187,423.91 : x
  2. Step 2: Convert to fraction form
    289,320.34/399,169.81 = 187,423.91/x
  3. Step 3: Cross multiply
    289,320.34x = 399,169.81 × 187,423.91
  4. Step 4: Simplify right side
    289,320.34x = 74,813,966,544.16
  5. Step 5: Solve for x
    x = 74,813,966,544.16/289,320.34
  6. Step 6: Final answer
    x = 258,585.23

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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.