Home / 1,312.51-1,968.80-434.73

Finding the Fourth Proportional to 1,312.51, 1,968.80 and 434.73

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Solution

The fourth proportional to 1,312.51, 1,968.80 and 434.73 is: 652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.51 : 1,968.80 = 434.73 : x
  2. Step 2: Convert to fraction form
    1,312.51/1,968.80 = 434.73/x
  3. Step 3: Cross multiply
    1,312.51x = 1,968.80 × 434.73
  4. Step 4: Simplify right side
    1,312.51x = 855,896.42
  5. Step 5: Solve for x
    x = 855,896.42/1,312.51
  6. Step 6: Final answer
    x = 652.11

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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.