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Finding the Fourth Proportional to 388,744.80, 536,476.68 and 216,680.40

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Solution

The fourth proportional to 388,744.80, 536,476.68 and 216,680.40 is: 299,023.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,744.80 : 536,476.68 = 216,680.40 : x
  2. Step 2: Convert to fraction form
    388,744.80/536,476.68 = 216,680.40/x
  3. Step 3: Cross multiply
    388,744.80x = 536,476.68 × 216,680.40
  4. Step 4: Simplify right side
    388,744.80x = 116,243,981,613.07
  5. Step 5: Solve for x
    x = 116,243,981,613.07/388,744.80
  6. Step 6: Final answer
    x = 299,023.89

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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.