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Finding the Fourth Proportional to 712.42, 1,064.15 and 603.16

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Solution

The fourth proportional to 712.42, 1,064.15 and 603.16 is: 900.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.42 : 1,064.15 = 603.16 : x
  2. Step 2: Convert to fraction form
    712.42/1,064.15 = 603.16/x
  3. Step 3: Cross multiply
    712.42x = 1,064.15 × 603.16
  4. Step 4: Simplify right side
    712.42x = 641,852.71
  5. Step 5: Solve for x
    x = 641,852.71/712.42
  6. Step 6: Final answer
    x = 900.95

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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.