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Finding the Fourth Proportional to 628.02, 870.75 and 607.77

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Solution

The fourth proportional to 628.02, 870.75 and 607.77 is: 842.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.02 : 870.75 = 607.77 : x
  2. Step 2: Convert to fraction form
    628.02/870.75 = 607.77/x
  3. Step 3: Cross multiply
    628.02x = 870.75 × 607.77
  4. Step 4: Simplify right side
    628.02x = 529,215.73
  5. Step 5: Solve for x
    x = 529,215.73/628.02
  6. Step 6: Final answer
    x = 842.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.