Home / 1,556.45-2,335.10-631.80

Finding the Fourth Proportional to 1,556.45, 2,335.10 and 631.80

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Solution

The fourth proportional to 1,556.45, 2,335.10 and 631.80 is: 947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.45 : 2,335.10 = 631.80 : x
  2. Step 2: Convert to fraction form
    1,556.45/2,335.10 = 631.80/x
  3. Step 3: Cross multiply
    1,556.45x = 2,335.10 × 631.80
  4. Step 4: Simplify right side
    1,556.45x = 1,475,313.02
  5. Step 5: Solve for x
    x = 1,475,313.02/1,556.45
  6. Step 6: Final answer
    x = 947.87

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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.