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Finding the Fourth Proportional to 614,621.90, 921,604.80 and 259,234.40

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Solution

The fourth proportional to 614,621.90, 921,604.80 and 259,234.40 is: 388,713.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,621.90 : 921,604.80 = 259,234.40 : x
  2. Step 2: Convert to fraction form
    614,621.90/921,604.80 = 259,234.40/x
  3. Step 3: Cross multiply
    614,621.90x = 921,604.80 × 259,234.40
  4. Step 4: Simplify right side
    614,621.90x = 238,911,667,365.12
  5. Step 5: Solve for x
    x = 238,911,667,365.12/614,621.90
  6. Step 6: Final answer
    x = 388,713.24

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1.5x scale

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.