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Finding the Fourth Proportional to 521,405.37, 719,552.16 and 291,960.72

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Solution

The fourth proportional to 521,405.37, 719,552.16 and 291,960.72 is: 402,912.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,405.37 : 719,552.16 = 291,960.72 : x
  2. Step 2: Convert to fraction form
    521,405.37/719,552.16 = 291,960.72/x
  3. Step 3: Cross multiply
    521,405.37x = 719,552.16 × 291,960.72
  4. Step 4: Simplify right side
    521,405.37x = 210,080,966,711.16
  5. Step 5: Solve for x
    x = 210,080,966,711.16/521,405.37
  6. Step 6: Final answer
    x = 402,912.93

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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.