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Finding the Fourth Proportional to 642.50, 958.71 and 603.32

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Solution

The fourth proportional to 642.50, 958.71 and 603.32 is: 900.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.50 : 958.71 = 603.32 : x
  2. Step 2: Convert to fraction form
    642.50/958.71 = 603.32/x
  3. Step 3: Cross multiply
    642.50x = 958.71 × 603.32
  4. Step 4: Simplify right side
    642.50x = 578,405.90
  5. Step 5: Solve for x
    x = 578,405.90/642.50
  6. Step 6: Final answer
    x = 900.24

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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.