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Finding the Fourth Proportional to 1,487.02, 2,230.06 and 621.13

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Solution

The fourth proportional to 1,487.02, 2,230.06 and 621.13 is: 931.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.02 : 2,230.06 = 621.13 : x
  2. Step 2: Convert to fraction form
    1,487.02/2,230.06 = 621.13/x
  3. Step 3: Cross multiply
    1,487.02x = 2,230.06 × 621.13
  4. Step 4: Simplify right side
    1,487.02x = 1,385,157.17
  5. Step 5: Solve for x
    x = 1,385,157.17/1,487.02
  6. Step 6: Final answer
    x = 931.50

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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.