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Finding the Fourth Proportional to 260,070.78, 390,417.30 and 154,939.26

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Solution

The fourth proportional to 260,070.78, 390,417.30 and 154,939.26 is: 232,594.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,070.78 : 390,417.30 = 154,939.26 : x
  2. Step 2: Convert to fraction form
    260,070.78/390,417.30 = 154,939.26/x
  3. Step 3: Cross multiply
    260,070.78x = 390,417.30 × 154,939.26
  4. Step 4: Simplify right side
    260,070.78x = 60,490,967,553.20
  5. Step 5: Solve for x
    x = 60,490,967,553.20/260,070.78
  6. Step 6: Final answer
    x = 232,594.25

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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.