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Finding the Fourth Proportional to 487,894.99, 673,365.53 and 281,123.80

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Solution

The fourth proportional to 487,894.99, 673,365.53 and 281,123.80 is: 387,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,894.99 : 673,365.53 = 281,123.80 : x
  2. Step 2: Convert to fraction form
    487,894.99/673,365.53 = 281,123.80/x
  3. Step 3: Cross multiply
    487,894.99x = 673,365.53 × 281,123.80
  4. Step 4: Simplify right side
    487,894.99x = 189,299,073,215.79
  5. Step 5: Solve for x
    x = 189,299,073,215.79/487,894.99
  6. Step 6: Final answer
    x = 387,991.42

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1.5x scale

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.