Home / 1,423.90-2,134.45-693.07

Finding the Fourth Proportional to 1,423.90, 2,134.45 and 693.07

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Solution

The fourth proportional to 1,423.90, 2,134.45 and 693.07 is: 1,038.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.90 : 2,134.45 = 693.07 : x
  2. Step 2: Convert to fraction form
    1,423.90/2,134.45 = 693.07/x
  3. Step 3: Cross multiply
    1,423.90x = 2,134.45 × 693.07
  4. Step 4: Simplify right side
    1,423.90x = 1,479,323.26
  5. Step 5: Solve for x
    x = 1,479,323.26/1,423.90
  6. Step 6: Final answer
    x = 1,038.92

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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.