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Finding the Fourth Proportional to 620,965.20, 931,447.80 and 355,244.70

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Solution

The fourth proportional to 620,965.20, 931,447.80 and 355,244.70 is: 532,867.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,965.20 : 931,447.80 = 355,244.70 : x
  2. Step 2: Convert to fraction form
    620,965.20/931,447.80 = 355,244.70/x
  3. Step 3: Cross multiply
    620,965.20x = 931,447.80 × 355,244.70
  4. Step 4: Simplify right side
    620,965.20x = 330,891,894,276.66
  5. Step 5: Solve for x
    x = 330,891,894,276.66/620,965.20
  6. Step 6: Final answer
    x = 532,867.05

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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.