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Finding the Fourth Proportional to 368,642.79, 552,078.45 and 210,391.47

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Solution

The fourth proportional to 368,642.79, 552,078.45 and 210,391.47 is: 315,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,642.79 : 552,078.45 = 210,391.47 : x
  2. Step 2: Convert to fraction form
    368,642.79/552,078.45 = 210,391.47/x
  3. Step 3: Cross multiply
    368,642.79x = 552,078.45 × 210,391.47
  4. Step 4: Simplify right side
    368,642.79x = 116,152,596,650.82
  5. Step 5: Solve for x
    x = 116,152,596,650.82/368,642.79
  6. Step 6: Final answer
    x = 315,081.70

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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.