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Finding the Fourth Proportional to 280,482.89, 420,474.58 and 102,948.71

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Solution

The fourth proportional to 280,482.89, 420,474.58 and 102,948.71 is: 154,331.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,482.89 : 420,474.58 = 102,948.71 : x
  2. Step 2: Convert to fraction form
    280,482.89/420,474.58 = 102,948.71/x
  3. Step 3: Cross multiply
    280,482.89x = 420,474.58 × 102,948.71
  4. Step 4: Simplify right side
    280,482.89x = 43,287,313,239.05
  5. Step 5: Solve for x
    x = 43,287,313,239.05/280,482.89
  6. Step 6: Final answer
    x = 154,331.39

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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.