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Finding the Fourth Proportional to 260,317.72, 390,476.58 and 135,901.72

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Solution

The fourth proportional to 260,317.72, 390,476.58 and 135,901.72 is: 203,852.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,317.72 : 390,476.58 = 135,901.72 : x
  2. Step 2: Convert to fraction form
    260,317.72/390,476.58 = 135,901.72/x
  3. Step 3: Cross multiply
    260,317.72x = 390,476.58 × 135,901.72
  4. Step 4: Simplify right side
    260,317.72x = 53,066,438,841.72
  5. Step 5: Solve for x
    x = 53,066,438,841.72/260,317.72
  6. Step 6: Final answer
    x = 203,852.58

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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.