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Finding the Fourth Proportional to 388,584, 536,479.20 and 254,681.28

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Solution

The fourth proportional to 388,584, 536,479.20 and 254,681.28 is: 351,613.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,584 : 536,479.20 = 254,681.28 : x
  2. Step 2: Convert to fraction form
    388,584/536,479.20 = 254,681.28/x
  3. Step 3: Cross multiply
    388,584x = 536,479.20 × 254,681.28
  4. Step 4: Simplify right side
    388,584x = 136,631,209,349.38
  5. Step 5: Solve for x
    x = 136,631,209,349.38/388,584
  6. Step 6: Final answer
    x = 351,613.06

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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.