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Finding the Fourth Proportional to 620,871.80, 931,437.30 and 354,414.20

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Solution

The fourth proportional to 620,871.80, 931,437.30 and 354,414.20 is: 531,695.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,871.80 : 931,437.30 = 354,414.20 : x
  2. Step 2: Convert to fraction form
    620,871.80/931,437.30 = 354,414.20/x
  3. Step 3: Cross multiply
    620,871.80x = 931,437.30 × 354,414.20
  4. Step 4: Simplify right side
    620,871.80x = 330,114,605,529.66
  5. Step 5: Solve for x
    x = 330,114,605,529.66/620,871.80
  6. Step 6: Final answer
    x = 531,695.28

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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.