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Finding the Fourth Proportional to 647,934.80, 971,902.20 and 310,918.10

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Solution

The fourth proportional to 647,934.80, 971,902.20 and 310,918.10 is: 466,377.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,934.80 : 971,902.20 = 310,918.10 : x
  2. Step 2: Convert to fraction form
    647,934.80/971,902.20 = 310,918.10/x
  3. Step 3: Cross multiply
    647,934.80x = 971,902.20 × 310,918.10
  4. Step 4: Simplify right side
    647,934.80x = 302,181,985,409.82
  5. Step 5: Solve for x
    x = 302,181,985,409.82/647,934.80
  6. Step 6: Final answer
    x = 466,377.15

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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.