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Finding the Fourth Proportional to 280,852.60, 421,278.90 and 103,486.90

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Solution

The fourth proportional to 280,852.60, 421,278.90 and 103,486.90 is: 155,230.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,852.60 : 421,278.90 = 103,486.90 : x
  2. Step 2: Convert to fraction form
    280,852.60/421,278.90 = 103,486.90/x
  3. Step 3: Cross multiply
    280,852.60x = 421,278.90 × 103,486.90
  4. Step 4: Simplify right side
    280,852.60x = 43,596,847,396.41
  5. Step 5: Solve for x
    x = 43,596,847,396.41/280,852.60
  6. Step 6: Final answer
    x = 155,230.35

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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.