Home / 1,681.20-2,521.53-707.13

Finding the Fourth Proportional to 1,681.20, 2,521.53 and 707.13

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Solution

The fourth proportional to 1,681.20, 2,521.53 and 707.13 is: 1,060.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.20 : 2,521.53 = 707.13 : x
  2. Step 2: Convert to fraction form
    1,681.20/2,521.53 = 707.13/x
  3. Step 3: Cross multiply
    1,681.20x = 2,521.53 × 707.13
  4. Step 4: Simplify right side
    1,681.20x = 1,783,049.51
  5. Step 5: Solve for x
    x = 1,783,049.51/1,681.20
  6. Step 6: Final answer
    x = 1,060.58

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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.