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Finding the Fourth Proportional to 287,731.70, 402,299.50 and 287,731.70

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Solution

The fourth proportional to 287,731.70, 402,299.50 and 287,731.70 is: 402,299.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,731.70 : 402,299.50 = 287,731.70 : x
  2. Step 2: Convert to fraction form
    287,731.70/402,299.50 = 287,731.70/x
  3. Step 3: Cross multiply
    287,731.70x = 402,299.50 × 287,731.70
  4. Step 4: Simplify right side
    287,731.70x = 115,754,319,044.15
  5. Step 5: Solve for x
    x = 115,754,319,044.15/287,731.70
  6. Step 6: Final answer
    x = 402,299.50

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1.5x scale

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.