Home / 1,412.08-2,117.75-631.64

Finding the Fourth Proportional to 1,412.08, 2,117.75 and 631.64

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Solution

The fourth proportional to 1,412.08, 2,117.75 and 631.64 is: 947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.08 : 2,117.75 = 631.64 : x
  2. Step 2: Convert to fraction form
    1,412.08/2,117.75 = 631.64/x
  3. Step 3: Cross multiply
    1,412.08x = 2,117.75 × 631.64
  4. Step 4: Simplify right side
    1,412.08x = 1,337,662.48
  5. Step 5: Solve for x
    x = 1,337,662.48/1,412.08
  6. Step 6: Final answer
    x = 947.30

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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.