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Finding the Fourth Proportional to 647,604.80, 893,587.20 and 361,116.80

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Solution

The fourth proportional to 647,604.80, 893,587.20 and 361,116.80 is: 498,281.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,604.80 : 893,587.20 = 361,116.80 : x
  2. Step 2: Convert to fraction form
    647,604.80/893,587.20 = 361,116.80/x
  3. Step 3: Cross multiply
    647,604.80x = 893,587.20 × 361,116.80
  4. Step 4: Simplify right side
    647,604.80x = 322,689,350,184.96
  5. Step 5: Solve for x
    x = 322,689,350,184.96/647,604.80
  6. Step 6: Final answer
    x = 498,281.28

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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.