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Finding the Fourth Proportional to 287,712.45, 402,272.55 and 287,712.45

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Solution

The fourth proportional to 287,712.45, 402,272.55 and 287,712.45 is: 402,272.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712.45 : 402,272.55 = 287,712.45 : x
  2. Step 2: Convert to fraction form
    287,712.45/402,272.55 = 287,712.45/x
  3. Step 3: Cross multiply
    287,712.45x = 402,272.55 × 287,712.45
  4. Step 4: Simplify right side
    287,712.45x = 115,738,820,928.25
  5. Step 5: Solve for x
    x = 115,738,820,928.25/287,712.45
  6. Step 6: Final answer
    x = 402,272.55

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.