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Finding the Fourth Proportional to 642,876.72, 964,241.08 and 258,611.12

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Solution

The fourth proportional to 642,876.72, 964,241.08 and 258,611.12 is: 387,886.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,876.72 : 964,241.08 = 258,611.12 : x
  2. Step 2: Convert to fraction form
    642,876.72/964,241.08 = 258,611.12/x
  3. Step 3: Cross multiply
    642,876.72x = 964,241.08 × 258,611.12
  4. Step 4: Simplify right side
    642,876.72x = 249,363,465,648.81
  5. Step 5: Solve for x
    x = 249,363,465,648.81/642,876.72
  6. Step 6: Final answer
    x = 387,886.91

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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.