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Finding the Fourth Proportional to 520,477.28, 718,243.20 and 291,020.48

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Solution

The fourth proportional to 520,477.28, 718,243.20 and 291,020.48 is: 401,599.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,477.28 : 718,243.20 = 291,020.48 : x
  2. Step 2: Convert to fraction form
    520,477.28/718,243.20 = 291,020.48/x
  3. Step 3: Cross multiply
    520,477.28x = 718,243.20 × 291,020.48
  4. Step 4: Simplify right side
    520,477.28x = 209,023,480,820.74
  5. Step 5: Solve for x
    x = 209,023,480,820.74/520,477.28
  6. Step 6: Final answer
    x = 401,599.63

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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.