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Finding the Fourth Proportional to 384,689.52, 530,780.56 and 223,448.80

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Solution

The fourth proportional to 384,689.52, 530,780.56 and 223,448.80 is: 308,306.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,689.52 : 530,780.56 = 223,448.80 : x
  2. Step 2: Convert to fraction form
    384,689.52/530,780.56 = 223,448.80/x
  3. Step 3: Cross multiply
    384,689.52x = 530,780.56 × 223,448.80
  4. Step 4: Simplify right side
    384,689.52x = 118,602,279,195.33
  5. Step 5: Solve for x
    x = 118,602,279,195.33/384,689.52
  6. Step 6: Final answer
    x = 308,306.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.