Home / 1,415.08-2,124.06-646.12

Finding the Fourth Proportional to 1,415.08, 2,124.06 and 646.12

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Solution

The fourth proportional to 1,415.08, 2,124.06 and 646.12 is: 969.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.08 : 2,124.06 = 646.12 : x
  2. Step 2: Convert to fraction form
    1,415.08/2,124.06 = 646.12/x
  3. Step 3: Cross multiply
    1,415.08x = 2,124.06 × 646.12
  4. Step 4: Simplify right side
    1,415.08x = 1,372,397.65
  5. Step 5: Solve for x
    x = 1,372,397.65/1,415.08
  6. Step 6: Final answer
    x = 969.84

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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.