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Finding the Fourth Proportional to 378,477.18, 522,274.65 and 217,218.72

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Solution

The fourth proportional to 378,477.18, 522,274.65 and 217,218.72 is: 299,748.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,477.18 : 522,274.65 = 217,218.72 : x
  2. Step 2: Convert to fraction form
    378,477.18/522,274.65 = 217,218.72/x
  3. Step 3: Cross multiply
    378,477.18x = 522,274.65 × 217,218.72
  4. Step 4: Simplify right side
    378,477.18x = 113,447,830,961.45
  5. Step 5: Solve for x
    x = 113,447,830,961.45/378,477.18
  6. Step 6: Final answer
    x = 299,748.14

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1.5x scale

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.