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Finding the Fourth Proportional to 287,773.20, 402,357.60 and 287,773.20

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Solution

The fourth proportional to 287,773.20, 402,357.60 and 287,773.20 is: 402,357.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,773.20 : 402,357.60 = 287,773.20 : x
  2. Step 2: Convert to fraction form
    287,773.20/402,357.60 = 287,773.20/x
  3. Step 3: Cross multiply
    287,773.20x = 402,357.60 × 287,773.20
  4. Step 4: Simplify right side
    287,773.20x = 115,787,734,096.32
  5. Step 5: Solve for x
    x = 115,787,734,096.32/287,773.20
  6. Step 6: Final answer
    x = 402,357.60

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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.