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Finding the Fourth Proportional to 627,238.80, 865,607.30 and 355,306.63

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Solution

The fourth proportional to 627,238.80, 865,607.30 and 355,306.63 is: 490,333.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,238.80 : 865,607.30 = 355,306.63 : x
  2. Step 2: Convert to fraction form
    627,238.80/865,607.30 = 355,306.63/x
  3. Step 3: Cross multiply
    627,238.80x = 865,607.30 × 355,306.63
  4. Step 4: Simplify right side
    627,238.80x = 307,556,012,666.40
  5. Step 5: Solve for x
    x = 307,556,012,666.40/627,238.80
  6. Step 6: Final answer
    x = 490,333.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.