Home / 1,113.35-1,669.98-291.60

Finding the Fourth Proportional to 1,113.35, 1,669.98 and 291.60

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Solution

The fourth proportional to 1,113.35, 1,669.98 and 291.60 is: 437.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.35 : 1,669.98 = 291.60 : x
  2. Step 2: Convert to fraction form
    1,113.35/1,669.98 = 291.60/x
  3. Step 3: Cross multiply
    1,113.35x = 1,669.98 × 291.60
  4. Step 4: Simplify right side
    1,113.35x = 486,971.70
  5. Step 5: Solve for x
    x = 486,971.70/1,113.35
  6. Step 6: Final answer
    x = 437.39

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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.