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Finding the Fourth Proportional to 708,956.54, 978,191.75 and 403,008.74

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Solution

The fourth proportional to 708,956.54, 978,191.75 and 403,008.74 is: 556,056.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,956.54 : 978,191.75 = 403,008.74 : x
  2. Step 2: Convert to fraction form
    708,956.54/978,191.75 = 403,008.74/x
  3. Step 3: Cross multiply
    708,956.54x = 978,191.75 × 403,008.74
  4. Step 4: Simplify right side
    708,956.54x = 394,219,828,098.90
  5. Step 5: Solve for x
    x = 394,219,828,098.90/708,956.54
  6. Step 6: Final answer
    x = 556,056.41

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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.