Home / 1,312.42-1,968.63-491.08

Finding the Fourth Proportional to 1,312.42, 1,968.63 and 491.08

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Solution

The fourth proportional to 1,312.42, 1,968.63 and 491.08 is: 736.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.42 : 1,968.63 = 491.08 : x
  2. Step 2: Convert to fraction form
    1,312.42/1,968.63 = 491.08/x
  3. Step 3: Cross multiply
    1,312.42x = 1,968.63 × 491.08
  4. Step 4: Simplify right side
    1,312.42x = 966,754.82
  5. Step 5: Solve for x
    x = 966,754.82/1,312.42
  6. Step 6: Final answer
    x = 736.62

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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.