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Finding the Fourth Proportional to 498,223.08, 687,240.98 and 355,029.40

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Solution

The fourth proportional to 498,223.08, 687,240.98 and 355,029.40 is: 489,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,223.08 : 687,240.98 = 355,029.40 : x
  2. Step 2: Convert to fraction form
    498,223.08/687,240.98 = 355,029.40/x
  3. Step 3: Cross multiply
    498,223.08x = 687,240.98 × 355,029.40
  4. Step 4: Simplify right side
    498,223.08x = 243,990,752,784.81
  5. Step 5: Solve for x
    x = 243,990,752,784.81/498,223.08
  6. Step 6: Final answer
    x = 489,721.90

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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.