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Finding the Fourth Proportional to 520,388.07, 718,095.61 and 316,410.67

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Solution

The fourth proportional to 520,388.07, 718,095.61 and 316,410.67 is: 436,622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,388.07 : 718,095.61 = 316,410.67 : x
  2. Step 2: Convert to fraction form
    520,388.07/718,095.61 = 316,410.67/x
  3. Step 3: Cross multiply
    520,388.07x = 718,095.61 × 316,410.67
  4. Step 4: Simplify right side
    520,388.07x = 227,213,113,084.16
  5. Step 5: Solve for x
    x = 227,213,113,084.16/520,388.07
  6. Step 6: Final answer
    x = 436,622.45

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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.