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Finding the Fourth Proportional to 487,563.84, 672,981.12 and 283,662.72

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Solution

The fourth proportional to 487,563.84, 672,981.12 and 283,662.72 is: 391,537.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,563.84 : 672,981.12 = 283,662.72 : x
  2. Step 2: Convert to fraction form
    487,563.84/672,981.12 = 283,662.72/x
  3. Step 3: Cross multiply
    487,563.84x = 672,981.12 × 283,662.72
  4. Step 4: Simplify right side
    487,563.84x = 190,899,655,007.85
  5. Step 5: Solve for x
    x = 190,899,655,007.85/487,563.84
  6. Step 6: Final answer
    x = 391,537.76

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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.