Home / 1,435.28-2,151.40-913.64

Finding the Fourth Proportional to 1,435.28, 2,151.40 and 913.64

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Solution

The fourth proportional to 1,435.28, 2,151.40 and 913.64 is: 1,369.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.28 : 2,151.40 = 913.64 : x
  2. Step 2: Convert to fraction form
    1,435.28/2,151.40 = 913.64/x
  3. Step 3: Cross multiply
    1,435.28x = 2,151.40 × 913.64
  4. Step 4: Simplify right side
    1,435.28x = 1,965,605.10
  5. Step 5: Solve for x
    x = 1,965,605.10/1,435.28
  6. Step 6: Final answer
    x = 1,369.49

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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.