Home / 1,461.60-2,190.40-766.84

Finding the Fourth Proportional to 1,461.60, 2,190.40 and 766.84

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Solution

The fourth proportional to 1,461.60, 2,190.40 and 766.84 is: 1,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.60 : 2,190.40 = 766.84 : x
  2. Step 2: Convert to fraction form
    1,461.60/2,190.40 = 766.84/x
  3. Step 3: Cross multiply
    1,461.60x = 2,190.40 × 766.84
  4. Step 4: Simplify right side
    1,461.60x = 1,679,686.34
  5. Step 5: Solve for x
    x = 1,679,686.34/1,461.60
  6. Step 6: Final answer
    x = 1,149.21

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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.