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Finding the Fourth Proportional to 520,989.12, 718,806.24 and 291,522.60

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Solution

The fourth proportional to 520,989.12, 718,806.24 and 291,522.60 is: 402,212.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,989.12 : 718,806.24 = 291,522.60 : x
  2. Step 2: Convert to fraction form
    520,989.12/718,806.24 = 291,522.60/x
  3. Step 3: Cross multiply
    520,989.12x = 718,806.24 × 291,522.60
  4. Step 4: Simplify right side
    520,989.12x = 209,548,263,981.02
  5. Step 5: Solve for x
    x = 209,548,263,981.02/520,989.12
  6. Step 6: Final answer
    x = 402,212.36

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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.