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Finding the Fourth Proportional to 289,811.60, 434,717.40 and 163,840.40

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Solution

The fourth proportional to 289,811.60, 434,717.40 and 163,840.40 is: 245,760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,811.60 : 434,717.40 = 163,840.40 : x
  2. Step 2: Convert to fraction form
    289,811.60/434,717.40 = 163,840.40/x
  3. Step 3: Cross multiply
    289,811.60x = 434,717.40 × 163,840.40
  4. Step 4: Simplify right side
    289,811.60x = 71,224,272,702.96
  5. Step 5: Solve for x
    x = 71,224,272,702.96/289,811.60
  6. Step 6: Final answer
    x = 245,760.60

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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.