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Finding the Fourth Proportional to 551,790.21, 828,264.47 and 489,011.97

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Solution

The fourth proportional to 551,790.21, 828,264.47 and 489,011.97 is: 734,031.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,790.21 : 828,264.47 = 489,011.97 : x
  2. Step 2: Convert to fraction form
    551,790.21/828,264.47 = 489,011.97/x
  3. Step 3: Cross multiply
    551,790.21x = 828,264.47 × 489,011.97
  4. Step 4: Simplify right side
    551,790.21x = 405,031,240,155.71
  5. Step 5: Solve for x
    x = 405,031,240,155.71/551,790.21
  6. Step 6: Final answer
    x = 734,031.22

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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.