Home / 805,190-1,111,162.20-465,680.12

Finding the Fourth Proportional to 805,190, 1,111,162.20 and 465,680.12

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Solution

The fourth proportional to 805,190, 1,111,162.20 and 465,680.12 is: 642,638.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,190 : 1,111,162.20 = 465,680.12 : x
  2. Step 2: Convert to fraction form
    805,190/1,111,162.20 = 465,680.12/x
  3. Step 3: Cross multiply
    805,190x = 1,111,162.20 × 465,680.12
  4. Step 4: Simplify right side
    805,190x = 517,446,146,635.46
  5. Step 5: Solve for x
    x = 517,446,146,635.46/805,190
  6. Step 6: Final answer
    x = 642,638.57

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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.