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Finding the Fourth Proportional to 987,398.78, 1,362,602.52 and 534,689.78

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Solution

The fourth proportional to 987,398.78, 1,362,602.52 and 534,689.78 is: 737,867.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,398.78 : 1,362,602.52 = 534,689.78 : x
  2. Step 2: Convert to fraction form
    987,398.78/1,362,602.52 = 534,689.78/x
  3. Step 3: Cross multiply
    987,398.78x = 1,362,602.52 × 534,689.78
  4. Step 4: Simplify right side
    987,398.78x = 728,569,634,833.23
  5. Step 5: Solve for x
    x = 728,569,634,833.23/987,398.78
  6. Step 6: Final answer
    x = 737,867.67

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1.5x scale

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.