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Finding the Fourth Proportional to 987,972, 1,363,402.64 and 535,262.96

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Solution

The fourth proportional to 987,972, 1,363,402.64 and 535,262.96 is: 738,663.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,972 : 1,363,402.64 = 535,262.96 : x
  2. Step 2: Convert to fraction form
    987,972/1,363,402.64 = 535,262.96/x
  3. Step 3: Cross multiply
    987,972x = 1,363,402.64 × 535,262.96
  4. Step 4: Simplify right side
    987,972x = 729,778,932,758.21
  5. Step 5: Solve for x
    x = 729,778,932,758.21/987,972
  6. Step 6: Final answer
    x = 738,663.58

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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.