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Finding the Fourth Proportional to 487,616.46, 672,639.81 and 283,644.42

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Solution

The fourth proportional to 487,616.46, 672,639.81 and 283,644.42 is: 391,271.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,616.46 : 672,639.81 = 283,644.42 : x
  2. Step 2: Convert to fraction form
    487,616.46/672,639.81 = 283,644.42/x
  3. Step 3: Cross multiply
    487,616.46x = 672,639.81 × 283,644.42
  4. Step 4: Simplify right side
    487,616.46x = 190,790,528,776.36
  5. Step 5: Solve for x
    x = 190,790,528,776.36/487,616.46
  6. Step 6: Final answer
    x = 391,271.72

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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.