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Finding the Fourth Proportional to 388,645.56, 536,328.54 and 218,934.36

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Solution

The fourth proportional to 388,645.56, 536,328.54 and 218,934.36 is: 302,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,645.56 : 536,328.54 = 218,934.36 : x
  2. Step 2: Convert to fraction form
    388,645.56/536,328.54 = 218,934.36/x
  3. Step 3: Cross multiply
    388,645.56x = 536,328.54 × 218,934.36
  4. Step 4: Simplify right side
    388,645.56x = 117,420,745,654.63
  5. Step 5: Solve for x
    x = 117,420,745,654.63/388,645.56
  6. Step 6: Final answer
    x = 302,128.10

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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.