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Finding the Fourth Proportional to 751.49, 1,038.50 and 603.87

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Solution

The fourth proportional to 751.49, 1,038.50 and 603.87 is: 834.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.49 : 1,038.50 = 603.87 : x
  2. Step 2: Convert to fraction form
    751.49/1,038.50 = 603.87/x
  3. Step 3: Cross multiply
    751.49x = 1,038.50 × 603.87
  4. Step 4: Simplify right side
    751.49x = 627,118.24
  5. Step 5: Solve for x
    x = 627,118.24/751.49
  6. Step 6: Final answer
    x = 834.50

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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.