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Finding the Fourth Proportional to 642,237.66, 886,276.89 and 355,751.73

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Solution

The fourth proportional to 642,237.66, 886,276.89 and 355,751.73 is: 490,931.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,237.66 : 886,276.89 = 355,751.73 : x
  2. Step 2: Convert to fraction form
    642,237.66/886,276.89 = 355,751.73/x
  3. Step 3: Cross multiply
    642,237.66x = 886,276.89 × 355,751.73
  4. Step 4: Simplify right side
    642,237.66x = 315,294,536,876.52
  5. Step 5: Solve for x
    x = 315,294,536,876.52/642,237.66
  6. Step 6: Final answer
    x = 490,931.25

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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.