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Finding the Fourth Proportional to 368,681.20, 553,021.56 and 210,798.88

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Solution

The fourth proportional to 368,681.20, 553,021.56 and 210,798.88 is: 316,198.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,681.20 : 553,021.56 = 210,798.88 : x
  2. Step 2: Convert to fraction form
    368,681.20/553,021.56 = 210,798.88/x
  3. Step 3: Cross multiply
    368,681.20x = 553,021.56 × 210,798.88
  4. Step 4: Simplify right side
    368,681.20x = 116,576,325,463.85
  5. Step 5: Solve for x
    x = 116,576,325,463.85/368,681.20
  6. Step 6: Final answer
    x = 316,198.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.