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Finding the Fourth Proportional to 292,815.40, 439,223.10 and 261,322.60

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Solution

The fourth proportional to 292,815.40, 439,223.10 and 261,322.60 is: 391,983.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,815.40 : 439,223.10 = 261,322.60 : x
  2. Step 2: Convert to fraction form
    292,815.40/439,223.10 = 261,322.60/x
  3. Step 3: Cross multiply
    292,815.40x = 439,223.10 × 261,322.60
  4. Step 4: Simplify right side
    292,815.40x = 114,778,922,472.06
  5. Step 5: Solve for x
    x = 114,778,922,472.06/292,815.40
  6. Step 6: Final answer
    x = 391,983.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.