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Finding the Fourth Proportional to 708,889.43, 978,228.53 and 402,923.34

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Solution

The fourth proportional to 708,889.43, 978,228.53 and 402,923.34 is: 556,012.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,889.43 : 978,228.53 = 402,923.34 : x
  2. Step 2: Convert to fraction form
    708,889.43/978,228.53 = 402,923.34/x
  3. Step 3: Cross multiply
    708,889.43x = 978,228.53 × 402,923.34
  4. Step 4: Simplify right side
    708,889.43x = 394,151,111,266.56
  5. Step 5: Solve for x
    x = 394,151,111,266.56/708,889.43
  6. Step 6: Final answer
    x = 556,012.12

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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.