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Finding the Fourth Proportional to 288,005.80, 432,008.70 and 218,021.80

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Solution

The fourth proportional to 288,005.80, 432,008.70 and 218,021.80 is: 327,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,005.80 : 432,008.70 = 218,021.80 : x
  2. Step 2: Convert to fraction form
    288,005.80/432,008.70 = 218,021.80/x
  3. Step 3: Cross multiply
    288,005.80x = 432,008.70 × 218,021.80
  4. Step 4: Simplify right side
    288,005.80x = 94,187,314,389.66
  5. Step 5: Solve for x
    x = 94,187,314,389.66/288,005.80
  6. Step 6: Final answer
    x = 327,032.70

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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.