Home / 642,442.89-886,534.05-355,945.89

Finding the Fourth Proportional to 642,442.89, 886,534.05 and 355,945.89

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Solution

The fourth proportional to 642,442.89, 886,534.05 and 355,945.89 is: 491,184.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,442.89 : 886,534.05 = 355,945.89 : x
  2. Step 2: Convert to fraction form
    642,442.89/886,534.05 = 355,945.89/x
  3. Step 3: Cross multiply
    642,442.89x = 886,534.05 × 355,945.89
  4. Step 4: Simplify right side
    642,442.89x = 315,558,151,442.56
  5. Step 5: Solve for x
    x = 315,558,151,442.56/642,442.89
  6. Step 6: Final answer
    x = 491,184.75

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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.