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Finding the Fourth Proportional to 521,628.66, 719,808.12 and 317,657.16

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Solution

The fourth proportional to 521,628.66, 719,808.12 and 317,657.16 is: 438,342.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,628.66 : 719,808.12 = 317,657.16 : x
  2. Step 2: Convert to fraction form
    521,628.66/719,808.12 = 317,657.16/x
  3. Step 3: Cross multiply
    521,628.66x = 719,808.12 × 317,657.16
  4. Step 4: Simplify right side
    521,628.66x = 228,652,203,144.14
  5. Step 5: Solve for x
    x = 228,652,203,144.14/521,628.66
  6. Step 6: Final answer
    x = 438,342.87

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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.