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Finding the Fourth Proportional to 1,865.61, 2,798.80 and 632.99

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Solution

The fourth proportional to 1,865.61, 2,798.80 and 632.99 is: 949.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.61 : 2,798.80 = 632.99 : x
  2. Step 2: Convert to fraction form
    1,865.61/2,798.80 = 632.99/x
  3. Step 3: Cross multiply
    1,865.61x = 2,798.80 × 632.99
  4. Step 4: Simplify right side
    1,865.61x = 1,771,596.84
  5. Step 5: Solve for x
    x = 1,771,596.84/1,865.61
  6. Step 6: Final answer
    x = 949.61

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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.