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Finding the Fourth Proportional to 388,874.40, 536,646.72 and 210,026.40

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Solution

The fourth proportional to 388,874.40, 536,646.72 and 210,026.40 is: 289,836.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,874.40 : 536,646.72 = 210,026.40 : x
  2. Step 2: Convert to fraction form
    388,874.40/536,646.72 = 210,026.40/x
  3. Step 3: Cross multiply
    388,874.40x = 536,646.72 × 210,026.40
  4. Step 4: Simplify right side
    388,874.40x = 112,709,978,673.41
  5. Step 5: Solve for x
    x = 112,709,978,673.41/388,874.40
  6. Step 6: Final answer
    x = 289,836.46

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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.