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Finding the Fourth Proportional to 215,412.80, 323,426.40 and 163,188.80

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Solution

The fourth proportional to 215,412.80, 323,426.40 and 163,188.80 is: 245,015.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,412.80 : 323,426.40 = 163,188.80 : x
  2. Step 2: Convert to fraction form
    215,412.80/323,426.40 = 163,188.80/x
  3. Step 3: Cross multiply
    215,412.80x = 323,426.40 × 163,188.80
  4. Step 4: Simplify right side
    215,412.80x = 52,779,566,104.32
  5. Step 5: Solve for x
    x = 52,779,566,104.32/215,412.80
  6. Step 6: Final answer
    x = 245,015.92

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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.