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Finding the Fourth Proportional to 280,955.80, 421,433.70 and 186,477.40

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Solution

The fourth proportional to 280,955.80, 421,433.70 and 186,477.40 is: 279,716.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,955.80 : 421,433.70 = 186,477.40 : x
  2. Step 2: Convert to fraction form
    280,955.80/421,433.70 = 186,477.40/x
  3. Step 3: Cross multiply
    280,955.80x = 421,433.70 × 186,477.40
  4. Step 4: Simplify right side
    280,955.80x = 78,587,860,648.38
  5. Step 5: Solve for x
    x = 78,587,860,648.38/280,955.80
  6. Step 6: Final answer
    x = 279,716.10

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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.