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Finding the Fourth Proportional to 953.02, 1,315.06 and 620.83

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Solution

The fourth proportional to 953.02, 1,315.06 and 620.83 is: 856.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.02 : 1,315.06 = 620.83 : x
  2. Step 2: Convert to fraction form
    953.02/1,315.06 = 620.83/x
  3. Step 3: Cross multiply
    953.02x = 1,315.06 × 620.83
  4. Step 4: Simplify right side
    953.02x = 816,428.70
  5. Step 5: Solve for x
    x = 816,428.70/953.02
  6. Step 6: Final answer
    x = 856.68

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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.