Home / 1,036.28-1,430.16-686.36

Finding the Fourth Proportional to 1,036.28, 1,430.16 and 686.36

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Solution

The fourth proportional to 1,036.28, 1,430.16 and 686.36 is: 947.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.28 : 1,430.16 = 686.36 : x
  2. Step 2: Convert to fraction form
    1,036.28/1,430.16 = 686.36/x
  3. Step 3: Cross multiply
    1,036.28x = 1,430.16 × 686.36
  4. Step 4: Simplify right side
    1,036.28x = 981,604.62
  5. Step 5: Solve for x
    x = 981,604.62/1,036.28
  6. Step 6: Final answer
    x = 947.24

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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.