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Finding the Fourth Proportional to 1,323,323.70, 1,984,985.55 and 819,438.90

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Solution

The fourth proportional to 1,323,323.70, 1,984,985.55 and 819,438.90 is: 1,229,158.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323,323.70 : 1,984,985.55 = 819,438.90 : x
  2. Step 2: Convert to fraction form
    1,323,323.70/1,984,985.55 = 819,438.90/x
  3. Step 3: Cross multiply
    1,323,323.70x = 1,984,985.55 × 819,438.90
  4. Step 4: Simplify right side
    1,323,323.70x = 1,626,574,375,607.90
  5. Step 5: Solve for x
    x = 1,626,574,375,607.90/1,323,323.70
  6. Step 6: Final answer
    x = 1,229,158.35

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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.