Home / 1,312.48-1,969.08-1,071.28

Finding the Fourth Proportional to 1,312.48, 1,969.08 and 1,071.28

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Solution

The fourth proportional to 1,312.48, 1,969.08 and 1,071.28 is: 1,607.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.48 : 1,969.08 = 1,071.28 : x
  2. Step 2: Convert to fraction form
    1,312.48/1,969.08 = 1,071.28/x
  3. Step 3: Cross multiply
    1,312.48x = 1,969.08 × 1,071.28
  4. Step 4: Simplify right side
    1,312.48x = 2,109,436.02
  5. Step 5: Solve for x
    x = 2,109,436.02/1,312.48
  6. Step 6: Final answer
    x = 1,607.21

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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.