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Finding the Fourth Proportional to 260,300.66, 390,005.38 and 142,055.03

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Solution

The fourth proportional to 260,300.66, 390,005.38 and 142,055.03 is: 212,839.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,300.66 : 390,005.38 = 142,055.03 : x
  2. Step 2: Convert to fraction form
    260,300.66/390,005.38 = 142,055.03/x
  3. Step 3: Cross multiply
    260,300.66x = 390,005.38 × 142,055.03
  4. Step 4: Simplify right side
    260,300.66x = 55,402,227,108.64
  5. Step 5: Solve for x
    x = 55,402,227,108.64/260,300.66
  6. Step 6: Final answer
    x = 212,839.37

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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.