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Finding the Fourth Proportional to 643,357.50, 965,036.28 and 440,753.82

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Solution

The fourth proportional to 643,357.50, 965,036.28 and 440,753.82 is: 661,130.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,357.50 : 965,036.28 = 440,753.82 : x
  2. Step 2: Convert to fraction form
    643,357.50/965,036.28 = 440,753.82/x
  3. Step 3: Cross multiply
    643,357.50x = 965,036.28 × 440,753.82
  4. Step 4: Simplify right side
    643,357.50x = 425,343,426,848.59
  5. Step 5: Solve for x
    x = 425,343,426,848.59/643,357.50
  6. Step 6: Final answer
    x = 661,130.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.