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Finding the Fourth Proportional to 354,635.52, 489,460.32 and 211,404.72

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Solution

The fourth proportional to 354,635.52, 489,460.32 and 211,404.72 is: 291,776.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,635.52 : 489,460.32 = 211,404.72 : x
  2. Step 2: Convert to fraction form
    354,635.52/489,460.32 = 211,404.72/x
  3. Step 3: Cross multiply
    354,635.52x = 489,460.32 × 211,404.72
  4. Step 4: Simplify right side
    354,635.52x = 103,474,221,900.71
  5. Step 5: Solve for x
    x = 103,474,221,900.71/354,635.52
  6. Step 6: Final answer
    x = 291,776.25

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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.