Home / 2,108.16-3,162.12-647.13

Finding the Fourth Proportional to 2,108.16, 3,162.12 and 647.13

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Solution

The fourth proportional to 2,108.16, 3,162.12 and 647.13 is: 970.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.16 : 3,162.12 = 647.13 : x
  2. Step 2: Convert to fraction form
    2,108.16/3,162.12 = 647.13/x
  3. Step 3: Cross multiply
    2,108.16x = 3,162.12 × 647.13
  4. Step 4: Simplify right side
    2,108.16x = 2,046,302.72
  5. Step 5: Solve for x
    x = 2,046,302.72/2,108.16
  6. Step 6: Final answer
    x = 970.66

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1.5x scale

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.