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Finding the Fourth Proportional to 630.84, 940.90 and 619.90

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Solution

The fourth proportional to 630.84, 940.90 and 619.90 is: 924.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.84 : 940.90 = 619.90 : x
  2. Step 2: Convert to fraction form
    630.84/940.90 = 619.90/x
  3. Step 3: Cross multiply
    630.84x = 940.90 × 619.90
  4. Step 4: Simplify right side
    630.84x = 583,260.81
  5. Step 5: Solve for x
    x = 583,260.81/630.84
  6. Step 6: Final answer
    x = 924.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.