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Finding the Fourth Proportional to 390,332.52, 538,658.88 and 211,484.52

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Solution

The fourth proportional to 390,332.52, 538,658.88 and 211,484.52 is: 291,848.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,332.52 : 538,658.88 = 211,484.52 : x
  2. Step 2: Convert to fraction form
    390,332.52/538,658.88 = 211,484.52/x
  3. Step 3: Cross multiply
    390,332.52x = 538,658.88 × 211,484.52
  4. Step 4: Simplify right side
    390,332.52x = 113,918,014,680.54
  5. Step 5: Solve for x
    x = 113,918,014,680.54/390,332.52
  6. Step 6: Final answer
    x = 291,848.64

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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.