Home / 2,148.17-3,222.05-686.93

Finding the Fourth Proportional to 2,148.17, 3,222.05 and 686.93

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Solution

The fourth proportional to 2,148.17, 3,222.05 and 686.93 is: 1,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.17 : 3,222.05 = 686.93 : x
  2. Step 2: Convert to fraction form
    2,148.17/3,222.05 = 686.93/x
  3. Step 3: Cross multiply
    2,148.17x = 3,222.05 × 686.93
  4. Step 4: Simplify right side
    2,148.17x = 2,213,303.26
  5. Step 5: Solve for x
    x = 2,213,303.26/2,148.17
  6. Step 6: Final answer
    x = 1,030.32

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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.