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Finding the Fourth Proportional to 487,897.74, 673,369.32 and 281,126.55

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Solution

The fourth proportional to 487,897.74, 673,369.32 and 281,126.55 is: 387,995.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,897.74 : 673,369.32 = 281,126.55 : x
  2. Step 2: Convert to fraction form
    487,897.74/673,369.32 = 281,126.55/x
  3. Step 3: Cross multiply
    487,897.74x = 673,369.32 × 281,126.55
  4. Step 4: Simplify right side
    487,897.74x = 189,301,993,807.45
  5. Step 5: Solve for x
    x = 189,301,993,807.45/487,897.74
  6. Step 6: Final answer
    x = 387,995.23

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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.