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Finding the Fourth Proportional to 260,061.78, 390,403.71 and 154,930.26

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Solution

The fourth proportional to 260,061.78, 390,403.71 and 154,930.26 is: 232,580.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,061.78 : 390,403.71 = 154,930.26 : x
  2. Step 2: Convert to fraction form
    260,061.78/390,403.71 = 154,930.26/x
  3. Step 3: Cross multiply
    260,061.78x = 390,403.71 × 154,930.26
  4. Step 4: Simplify right side
    260,061.78x = 60,485,348,295.26
  5. Step 5: Solve for x
    x = 60,485,348,295.26/260,061.78
  6. Step 6: Final answer
    x = 232,580.69

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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.