Home / 1,421.51-2,134.58-877.15

Finding the Fourth Proportional to 1,421.51, 2,134.58 and 877.15

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Solution

The fourth proportional to 1,421.51, 2,134.58 and 877.15 is: 1,317.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.51 : 2,134.58 = 877.15 : x
  2. Step 2: Convert to fraction form
    1,421.51/2,134.58 = 877.15/x
  3. Step 3: Cross multiply
    1,421.51x = 2,134.58 × 877.15
  4. Step 4: Simplify right side
    1,421.51x = 1,872,348.42
  5. Step 5: Solve for x
    x = 1,872,348.42/1,421.51
  6. Step 6: Final answer
    x = 1,317.16

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1.5x scale

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.