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Finding the Fourth Proportional to 520,478.28, 718,244.58 and 291,021.48

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Solution

The fourth proportional to 520,478.28, 718,244.58 and 291,021.48 is: 401,601.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,478.28 : 718,244.58 = 291,021.48 : x
  2. Step 2: Convert to fraction form
    520,478.28/718,244.58 = 291,021.48/x
  3. Step 3: Cross multiply
    520,478.28x = 718,244.58 × 291,021.48
  4. Step 4: Simplify right side
    520,478.28x = 209,024,600,673.58
  5. Step 5: Solve for x
    x = 209,024,600,673.58/520,478.28
  6. Step 6: Final answer
    x = 401,601.01

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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.