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Finding the Fourth Proportional to 388,807.50, 536,554.35 and 209,959.50

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Solution

The fourth proportional to 388,807.50, 536,554.35 and 209,959.50 is: 289,744.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,807.50 : 536,554.35 = 209,959.50 : x
  2. Step 2: Convert to fraction form
    388,807.50/536,554.35 = 209,959.50/x
  3. Step 3: Cross multiply
    388,807.50x = 536,554.35 × 209,959.50
  4. Step 4: Simplify right side
    388,807.50x = 112,654,683,048.83
  5. Step 5: Solve for x
    x = 112,654,683,048.83/388,807.50
  6. Step 6: Final answer
    x = 289,744.11

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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.