Home / 1,065.28-1,470.10-623.08

Finding the Fourth Proportional to 1,065.28, 1,470.10 and 623.08

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Solution

The fourth proportional to 1,065.28, 1,470.10 and 623.08 is: 859.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.28 : 1,470.10 = 623.08 : x
  2. Step 2: Convert to fraction form
    1,065.28/1,470.10 = 623.08/x
  3. Step 3: Cross multiply
    1,065.28x = 1,470.10 × 623.08
  4. Step 4: Simplify right side
    1,065.28x = 915,989.91
  5. Step 5: Solve for x
    x = 915,989.91/1,065.28
  6. Step 6: Final answer
    x = 859.86

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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.