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Finding the Fourth Proportional to 620,437.30, 869,793.20 and 620,437.30

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Solution

The fourth proportional to 620,437.30, 869,793.20 and 620,437.30 is: 869,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,437.30 : 869,793.20 = 620,437.30 : x
  2. Step 2: Convert to fraction form
    620,437.30/869,793.20 = 620,437.30/x
  3. Step 3: Cross multiply
    620,437.30x = 869,793.20 × 620,437.30
  4. Step 4: Simplify right side
    620,437.30x = 539,652,144,566.36
  5. Step 5: Solve for x
    x = 539,652,144,566.36/620,437.30
  6. Step 6: Final answer
    x = 869,793.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.