Home / 1,158.18-1,598.36-686.45

Finding the Fourth Proportional to 1,158.18, 1,598.36 and 686.45

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Solution

The fourth proportional to 1,158.18, 1,598.36 and 686.45 is: 947.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.18 : 1,598.36 = 686.45 : x
  2. Step 2: Convert to fraction form
    1,158.18/1,598.36 = 686.45/x
  3. Step 3: Cross multiply
    1,158.18x = 1,598.36 × 686.45
  4. Step 4: Simplify right side
    1,158.18x = 1,097,182.80
  5. Step 5: Solve for x
    x = 1,097,182.80/1,158.18
  6. Step 6: Final answer
    x = 947.33

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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.