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Finding the Fourth Proportional to 489,521.29, 734,818.94 and 388,965.77

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Solution

The fourth proportional to 489,521.29, 734,818.94 and 388,965.77 is: 583,875.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,521.29 : 734,818.94 = 388,965.77 : x
  2. Step 2: Convert to fraction form
    489,521.29/734,818.94 = 388,965.77/x
  3. Step 3: Cross multiply
    489,521.29x = 734,818.94 × 388,965.77
  4. Step 4: Simplify right side
    489,521.29x = 285,819,414,807.68
  5. Step 5: Solve for x
    x = 285,819,414,807.68/489,521.29
  6. Step 6: Final answer
    x = 583,875.35

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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.