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Finding the Fourth Proportional to 385,384.40, 538,488.40 and 385,384.40

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Solution

The fourth proportional to 385,384.40, 538,488.40 and 385,384.40 is: 538,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,384.40 : 538,488.40 = 385,384.40 : x
  2. Step 2: Convert to fraction form
    385,384.40/538,488.40 = 385,384.40/x
  3. Step 3: Cross multiply
    385,384.40x = 538,488.40 × 385,384.40
  4. Step 4: Simplify right side
    385,384.40x = 207,525,028,940.96
  5. Step 5: Solve for x
    x = 207,525,028,940.96/385,384.40
  6. Step 6: Final answer
    x = 538,488.40

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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.