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Finding the Fourth Proportional to 402,336.47, 555,468.16 and 266,486.86

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Solution

The fourth proportional to 402,336.47, 555,468.16 and 266,486.86 is: 367,913.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,336.47 : 555,468.16 = 266,486.86 : x
  2. Step 2: Convert to fraction form
    402,336.47/555,468.16 = 266,486.86/x
  3. Step 3: Cross multiply
    402,336.47x = 555,468.16 × 266,486.86
  4. Step 4: Simplify right side
    402,336.47x = 148,024,965,566.66
  5. Step 5: Solve for x
    x = 148,024,965,566.66/402,336.47
  6. Step 6: Final answer
    x = 367,913.37

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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.