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Finding the Fourth Proportional to 280,595.34, 420,955.21 and 80,900.15

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Solution

The fourth proportional to 280,595.34, 420,955.21 and 80,900.15 is: 121,368.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,595.34 : 420,955.21 = 80,900.15 : x
  2. Step 2: Convert to fraction form
    280,595.34/420,955.21 = 80,900.15/x
  3. Step 3: Cross multiply
    280,595.34x = 420,955.21 × 80,900.15
  4. Step 4: Simplify right side
    280,595.34x = 34,055,339,632.28
  5. Step 5: Solve for x
    x = 34,055,339,632.28/280,595.34
  6. Step 6: Final answer
    x = 121,368.16

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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.