Home / 1,010.30-1,515.45-931.10

Finding the Fourth Proportional to 1,010.30, 1,515.45 and 931.10

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Solution

The fourth proportional to 1,010.30, 1,515.45 and 931.10 is: 1,396.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.30 : 1,515.45 = 931.10 : x
  2. Step 2: Convert to fraction form
    1,010.30/1,515.45 = 931.10/x
  3. Step 3: Cross multiply
    1,010.30x = 1,515.45 × 931.10
  4. Step 4: Simplify right side
    1,010.30x = 1,411,035.50
  5. Step 5: Solve for x
    x = 1,411,035.50/1,010.30
  6. Step 6: Final answer
    x = 1,396.65

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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.