Home / 1,539.12-2,303.65-1,128.16

Finding the Fourth Proportional to 1,539.12, 2,303.65 and 1,128.16

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Solution

The fourth proportional to 1,539.12, 2,303.65 and 1,128.16 is: 1,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.12 : 2,303.65 = 1,128.16 : x
  2. Step 2: Convert to fraction form
    1,539.12/2,303.65 = 1,128.16/x
  3. Step 3: Cross multiply
    1,539.12x = 2,303.65 × 1,128.16
  4. Step 4: Simplify right side
    1,539.12x = 2,598,885.78
  5. Step 5: Solve for x
    x = 2,598,885.78/1,539.12
  6. Step 6: Final answer
    x = 1,688.55

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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.