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Finding the Fourth Proportional to 775.60, 1,070.48 and 607.22

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Solution

The fourth proportional to 775.60, 1,070.48 and 607.22 is: 838.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.60 : 1,070.48 = 607.22 : x
  2. Step 2: Convert to fraction form
    775.60/1,070.48 = 607.22/x
  3. Step 3: Cross multiply
    775.60x = 1,070.48 × 607.22
  4. Step 4: Simplify right side
    775.60x = 650,016.87
  5. Step 5: Solve for x
    x = 650,016.87/775.60
  6. Step 6: Final answer
    x = 838.08

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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.