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Finding the Fourth Proportional to 520,486.48, 718,231.44 and 316,509.22

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Solution

The fourth proportional to 520,486.48, 718,231.44 and 316,509.22 is: 436,758.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,486.48 : 718,231.44 = 316,509.22 : x
  2. Step 2: Convert to fraction form
    520,486.48/718,231.44 = 316,509.22/x
  3. Step 3: Cross multiply
    520,486.48x = 718,231.44 × 316,509.22
  4. Step 4: Simplify right side
    520,486.48x = 227,326,872,853.88
  5. Step 5: Solve for x
    x = 227,326,872,853.88/520,486.48
  6. Step 6: Final answer
    x = 436,758.46

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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.