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Finding the Fourth Proportional to 620,447.40, 931,362.30 and 340,511.40

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Solution

The fourth proportional to 620,447.40, 931,362.30 and 340,511.40 is: 511,146.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,447.40 : 931,362.30 = 340,511.40 : x
  2. Step 2: Convert to fraction form
    620,447.40/931,362.30 = 340,511.40/x
  3. Step 3: Cross multiply
    620,447.40x = 931,362.30 × 340,511.40
  4. Step 4: Simplify right side
    620,447.40x = 317,139,480,680.22
  5. Step 5: Solve for x
    x = 317,139,480,680.22/620,447.40
  6. Step 6: Final answer
    x = 511,146.44

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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.