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Finding the Fourth Proportional to 280,595.46, 420,955.40 and 80,900.28

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Solution

The fourth proportional to 280,595.46, 420,955.40 and 80,900.28 is: 121,368.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,595.46 : 420,955.40 = 80,900.28 : x
  2. Step 2: Convert to fraction form
    280,595.46/420,955.40 = 80,900.28/x
  3. Step 3: Cross multiply
    280,595.46x = 420,955.40 × 80,900.28
  4. Step 4: Simplify right side
    280,595.46x = 34,055,409,727.51
  5. Step 5: Solve for x
    x = 34,055,409,727.51/280,595.46
  6. Step 6: Final answer
    x = 121,368.36

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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.