Home / 1,210.30-1,670.28-915.04

Finding the Fourth Proportional to 1,210.30, 1,670.28 and 915.04

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Solution

The fourth proportional to 1,210.30, 1,670.28 and 915.04 is: 1,262.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.30 : 1,670.28 = 915.04 : x
  2. Step 2: Convert to fraction form
    1,210.30/1,670.28 = 915.04/x
  3. Step 3: Cross multiply
    1,210.30x = 1,670.28 × 915.04
  4. Step 4: Simplify right side
    1,210.30x = 1,528,373.01
  5. Step 5: Solve for x
    x = 1,528,373.01/1,210.30
  6. Step 6: Final answer
    x = 1,262.81

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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.