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Finding the Fourth Proportional to 388,439.20, 544,920.80 and 388,439.20

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Solution

The fourth proportional to 388,439.20, 544,920.80 and 388,439.20 is: 544,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,439.20 : 544,920.80 = 388,439.20 : x
  2. Step 2: Convert to fraction form
    388,439.20/544,920.80 = 388,439.20/x
  3. Step 3: Cross multiply
    388,439.20x = 544,920.80 × 388,439.20
  4. Step 4: Simplify right side
    388,439.20x = 211,668,599,615.36
  5. Step 5: Solve for x
    x = 211,668,599,615.36/388,439.20
  6. Step 6: Final answer
    x = 544,920.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.