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Finding the Fourth Proportional to 287,740.70, 402,312.10 and 287,740.70

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Solution

The fourth proportional to 287,740.70, 402,312.10 and 287,740.70 is: 402,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,740.70 : 402,312.10 = 287,740.70 : x
  2. Step 2: Convert to fraction form
    287,740.70/402,312.10 = 287,740.70/x
  3. Step 3: Cross multiply
    287,740.70x = 402,312.10 × 287,740.70
  4. Step 4: Simplify right side
    287,740.70x = 115,761,565,272.47
  5. Step 5: Solve for x
    x = 115,761,565,272.47/287,740.70
  6. Step 6: Final answer
    x = 402,312.10

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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.