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Finding the Fourth Proportional to 520,374.11, 718,076.64 and 316,396.72

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Solution

The fourth proportional to 520,374.11, 718,076.64 and 316,396.72 is: 436,603.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,374.11 : 718,076.64 = 316,396.72 : x
  2. Step 2: Convert to fraction form
    520,374.11/718,076.64 = 316,396.72/x
  3. Step 3: Cross multiply
    520,374.11x = 718,076.64 × 316,396.72
  4. Step 4: Simplify right side
    520,374.11x = 227,197,091,649.52
  5. Step 5: Solve for x
    x = 227,197,091,649.52/520,374.11
  6. Step 6: Final answer
    x = 436,603.38

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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.