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Finding the Fourth Proportional to 218,777.80, 328,166.70 and 166,289.80

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Solution

The fourth proportional to 218,777.80, 328,166.70 and 166,289.80 is: 249,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,777.80 : 328,166.70 = 166,289.80 : x
  2. Step 2: Convert to fraction form
    218,777.80/328,166.70 = 166,289.80/x
  3. Step 3: Cross multiply
    218,777.80x = 328,166.70 × 166,289.80
  4. Step 4: Simplify right side
    218,777.80x = 54,570,774,909.66
  5. Step 5: Solve for x
    x = 54,570,774,909.66/218,777.80
  6. Step 6: Final answer
    x = 249,434.70

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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.