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Finding the Fourth Proportional to 260,070.40, 390,105.60 and 161,766.40

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Solution

The fourth proportional to 260,070.40, 390,105.60 and 161,766.40 is: 242,649.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,070.40 : 390,105.60 = 161,766.40 : x
  2. Step 2: Convert to fraction form
    260,070.40/390,105.60 = 161,766.40/x
  3. Step 3: Cross multiply
    260,070.40x = 390,105.60 × 161,766.40
  4. Step 4: Simplify right side
    260,070.40x = 63,105,978,531.84
  5. Step 5: Solve for x
    x = 63,105,978,531.84/260,070.40
  6. Step 6: Final answer
    x = 242,649.60

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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.