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Finding the Fourth Proportional to 816.47, 1,125.98 and 607.17

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Solution

The fourth proportional to 816.47, 1,125.98 and 607.17 is: 837.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.47 : 1,125.98 = 607.17 : x
  2. Step 2: Convert to fraction form
    816.47/1,125.98 = 607.17/x
  3. Step 3: Cross multiply
    816.47x = 1,125.98 × 607.17
  4. Step 4: Simplify right side
    816.47x = 683,664.99
  5. Step 5: Solve for x
    x = 683,664.99/816.47
  6. Step 6: Final answer
    x = 837.34

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1.5x scale

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.