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Finding the Fourth Proportional to 354,570.55, 489,416.52 and 218,647.15

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Solution

The fourth proportional to 354,570.55, 489,416.52 and 218,647.15 is: 301,800.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,570.55 : 489,416.52 = 218,647.15 : x
  2. Step 2: Convert to fraction form
    354,570.55/489,416.52 = 218,647.15/x
  3. Step 3: Cross multiply
    354,570.55x = 489,416.52 × 218,647.15
  4. Step 4: Simplify right side
    354,570.55x = 107,009,527,260.92
  5. Step 5: Solve for x
    x = 107,009,527,260.92/354,570.55
  6. Step 6: Final answer
    x = 301,800.38

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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.