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Finding the Fourth Proportional to 647,891.80, 971,837.70 and 310,875.10

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Solution

The fourth proportional to 647,891.80, 971,837.70 and 310,875.10 is: 466,312.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,891.80 : 971,837.70 = 310,875.10 : x
  2. Step 2: Convert to fraction form
    647,891.80/971,837.70 = 310,875.10/x
  3. Step 3: Cross multiply
    647,891.80x = 971,837.70 × 310,875.10
  4. Step 4: Simplify right side
    647,891.80x = 302,120,142,171.27
  5. Step 5: Solve for x
    x = 302,120,142,171.27/647,891.80
  6. Step 6: Final answer
    x = 466,312.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.