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Finding the Fourth Proportional to 719,339.29, 992,688.31 and 397,049.47

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Solution

The fourth proportional to 719,339.29, 992,688.31 and 397,049.47 is: 547,928.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,339.29 : 992,688.31 = 397,049.47 : x
  2. Step 2: Convert to fraction form
    719,339.29/992,688.31 = 397,049.47/x
  3. Step 3: Cross multiply
    719,339.29x = 992,688.31 × 397,049.47
  4. Step 4: Simplify right side
    719,339.29x = 394,146,370,051.87
  5. Step 5: Solve for x
    x = 394,146,370,051.87/719,339.29
  6. Step 6: Final answer
    x = 547,928.32

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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.