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Finding the Fourth Proportional to 388,888.80, 536,508.72 and 238,073.28

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Solution

The fourth proportional to 388,888.80, 536,508.72 and 238,073.28 is: 328,444.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,888.80 : 536,508.72 = 238,073.28 : x
  2. Step 2: Convert to fraction form
    388,888.80/536,508.72 = 238,073.28/x
  3. Step 3: Cross multiply
    388,888.80x = 536,508.72 × 238,073.28
  4. Step 4: Simplify right side
    388,888.80x = 127,728,390,719.00
  5. Step 5: Solve for x
    x = 127,728,390,719.00/388,888.80
  6. Step 6: Final answer
    x = 328,444.51

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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.