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Finding the Fourth Proportional to 708,902.79, 978,246.83 and 402,936.63

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Solution

The fourth proportional to 708,902.79, 978,246.83 and 402,936.63 is: 556,030.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,902.79 : 978,246.83 = 402,936.63 : x
  2. Step 2: Convert to fraction form
    708,902.79/978,246.83 = 402,936.63/x
  3. Step 3: Cross multiply
    708,902.79x = 978,246.83 × 402,936.63
  4. Step 4: Simplify right side
    708,902.79x = 394,171,478,973.70
  5. Step 5: Solve for x
    x = 394,171,478,973.70/708,902.79
  6. Step 6: Final answer
    x = 556,030.37

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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.