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Finding the Fourth Proportional to 708,905.52, 978,250.76 and 402,939.47

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Solution

The fourth proportional to 708,905.52, 978,250.76 and 402,939.47 is: 556,034.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,905.52 : 978,250.76 = 402,939.47 : x
  2. Step 2: Convert to fraction form
    708,905.52/978,250.76 = 402,939.47/x
  3. Step 3: Cross multiply
    708,905.52x = 978,250.76 × 402,939.47
  4. Step 4: Simplify right side
    708,905.52x = 394,175,835,855.55
  5. Step 5: Solve for x
    x = 394,175,835,855.55/708,905.52
  6. Step 6: Final answer
    x = 556,034.37

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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.