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Finding the Fourth Proportional to 1,084.95, 1,624.80 and 621.33

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Solution

The fourth proportional to 1,084.95, 1,624.80 and 621.33 is: 930.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.95 : 1,624.80 = 621.33 : x
  2. Step 2: Convert to fraction form
    1,084.95/1,624.80 = 621.33/x
  3. Step 3: Cross multiply
    1,084.95x = 1,624.80 × 621.33
  4. Step 4: Simplify right side
    1,084.95x = 1,009,536.98
  5. Step 5: Solve for x
    x = 1,009,536.98/1,084.95
  6. Step 6: Final answer
    x = 930.49

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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.