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Finding the Fourth Proportional to 388,763.55, 536,510.25 and 216,681.75

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Solution

The fourth proportional to 388,763.55, 536,510.25 and 216,681.75 is: 299,030.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,763.55 : 536,510.25 = 216,681.75 : x
  2. Step 2: Convert to fraction form
    388,763.55/536,510.25 = 216,681.75/x
  3. Step 3: Cross multiply
    388,763.55x = 536,510.25 × 216,681.75
  4. Step 4: Simplify right side
    388,763.55x = 116,251,979,862.94
  5. Step 5: Solve for x
    x = 116,251,979,862.94/388,763.55
  6. Step 6: Final answer
    x = 299,030.04

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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.