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Finding the Fourth Proportional to 642,862.98, 887,162.94 and 352,455.30

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Solution

The fourth proportional to 642,862.98, 887,162.94 and 352,455.30 is: 486,394.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,862.98 : 887,162.94 = 352,455.30 : x
  2. Step 2: Convert to fraction form
    642,862.98/887,162.94 = 352,455.30/x
  3. Step 3: Cross multiply
    642,862.98x = 887,162.94 × 352,455.30
  4. Step 4: Simplify right side
    642,862.98x = 312,685,280,166.58
  5. Step 5: Solve for x
    x = 312,685,280,166.58/642,862.98
  6. Step 6: Final answer
    x = 486,394.91

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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.