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Finding the Fourth Proportional to 215,323.80, 322,985.70 and 65,562.90

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Solution

The fourth proportional to 215,323.80, 322,985.70 and 65,562.90 is: 98,344.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,323.80 : 322,985.70 = 65,562.90 : x
  2. Step 2: Convert to fraction form
    215,323.80/322,985.70 = 65,562.90/x
  3. Step 3: Cross multiply
    215,323.80x = 322,985.70 × 65,562.90
  4. Step 4: Simplify right side
    215,323.80x = 21,175,879,150.53
  5. Step 5: Solve for x
    x = 21,175,879,150.53/215,323.80
  6. Step 6: Final answer
    x = 98,344.35

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1.5x scale

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.