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Finding the Fourth Proportional to 487,901.74, 673,374.84 and 281,130.56

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Solution

The fourth proportional to 487,901.74, 673,374.84 and 281,130.56 is: 388,000.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,901.74 : 673,374.84 = 281,130.56 : x
  2. Step 2: Convert to fraction form
    487,901.74/673,374.84 = 281,130.56/x
  3. Step 3: Cross multiply
    487,901.74x = 673,374.84 × 281,130.56
  4. Step 4: Simplify right side
    487,901.74x = 189,306,245,859.11
  5. Step 5: Solve for x
    x = 189,306,245,859.11/487,901.74
  6. Step 6: Final answer
    x = 388,000.76

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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.