Home / 1,539.95-2,125.84-981.19

Finding the Fourth Proportional to 1,539.95, 2,125.84 and 981.19

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Solution

The fourth proportional to 1,539.95, 2,125.84 and 981.19 is: 1,354.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.95 : 2,125.84 = 981.19 : x
  2. Step 2: Convert to fraction form
    1,539.95/2,125.84 = 981.19/x
  3. Step 3: Cross multiply
    1,539.95x = 2,125.84 × 981.19
  4. Step 4: Simplify right side
    1,539.95x = 2,085,845.18
  5. Step 5: Solve for x
    x = 2,085,845.18/1,539.95
  6. Step 6: Final answer
    x = 1,354.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.