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Finding the Fourth Proportional to 1,014.84, 1,400.50 and 621.63

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Solution

The fourth proportional to 1,014.84, 1,400.50 and 621.63 is: 857.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.84 : 1,400.50 = 621.63 : x
  2. Step 2: Convert to fraction form
    1,014.84/1,400.50 = 621.63/x
  3. Step 3: Cross multiply
    1,014.84x = 1,400.50 × 621.63
  4. Step 4: Simplify right side
    1,014.84x = 870,598.41
  5. Step 5: Solve for x
    x = 870,598.41/1,014.84
  6. Step 6: Final answer
    x = 857.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.