Home / 280,315.68-420,534.11-90,795.12

Finding the Fourth Proportional to 280,315.68, 420,534.11 and 90,795.12

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Solution

The fourth proportional to 280,315.68, 420,534.11 and 90,795.12 is: 136,212.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,315.68 : 420,534.11 = 90,795.12 : x
  2. Step 2: Convert to fraction form
    280,315.68/420,534.11 = 90,795.12/x
  3. Step 3: Cross multiply
    280,315.68x = 420,534.11 × 90,795.12
  4. Step 4: Simplify right side
    280,315.68x = 38,182,445,208.53
  5. Step 5: Solve for x
    x = 38,182,445,208.53/280,315.68
  6. Step 6: Final answer
    x = 136,212.31

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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.