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Finding the Fourth Proportional to 260,070.40, 390,105.60 and 190,086.40

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Solution

The fourth proportional to 260,070.40, 390,105.60 and 190,086.40 is: 285,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,070.40 : 390,105.60 = 190,086.40 : x
  2. Step 2: Convert to fraction form
    260,070.40/390,105.60 = 190,086.40/x
  3. Step 3: Cross multiply
    260,070.40x = 390,105.60 × 190,086.40
  4. Step 4: Simplify right side
    260,070.40x = 74,153,769,123.84
  5. Step 5: Solve for x
    x = 74,153,769,123.84/260,070.40
  6. Step 6: Final answer
    x = 285,129.60

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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.