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Finding the Fourth Proportional to 620,964.78, 931,419.20 and 216,442.23

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Solution

The fourth proportional to 620,964.78, 931,419.20 and 216,442.23 is: 324,653.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,964.78 : 931,419.20 = 216,442.23 : x
  2. Step 2: Convert to fraction form
    620,964.78/931,419.20 = 216,442.23/x
  3. Step 3: Cross multiply
    620,964.78x = 931,419.20 × 216,442.23
  4. Step 4: Simplify right side
    620,964.78x = 201,598,445,761.10
  5. Step 5: Solve for x
    x = 201,598,445,761.10/620,964.78
  6. Step 6: Final answer
    x = 324,653.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.