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Finding the Fourth Proportional to 287,710.45, 402,269.75 and 287,710.45

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Solution

The fourth proportional to 287,710.45, 402,269.75 and 287,710.45 is: 402,269.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,710.45 : 402,269.75 = 287,710.45 : x
  2. Step 2: Convert to fraction form
    287,710.45/402,269.75 = 287,710.45/x
  3. Step 3: Cross multiply
    287,710.45x = 402,269.75 × 287,710.45
  4. Step 4: Simplify right side
    287,710.45x = 115,737,210,793.89
  5. Step 5: Solve for x
    x = 115,737,210,793.89/287,710.45
  6. Step 6: Final answer
    x = 402,269.75

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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.