Home / 1,284.65-1,927.57-407.29

Finding the Fourth Proportional to 1,284.65, 1,927.57 and 407.29

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Solution

The fourth proportional to 1,284.65, 1,927.57 and 407.29 is: 611.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.65 : 1,927.57 = 407.29 : x
  2. Step 2: Convert to fraction form
    1,284.65/1,927.57 = 407.29/x
  3. Step 3: Cross multiply
    1,284.65x = 1,927.57 × 407.29
  4. Step 4: Simplify right side
    1,284.65x = 785,068.31
  5. Step 5: Solve for x
    x = 785,068.31/1,284.65
  6. Step 6: Final answer
    x = 611.12

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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.