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Finding the Fourth Proportional to 260,316.72, 390,475.08 and 135,900.72

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Solution

The fourth proportional to 260,316.72, 390,475.08 and 135,900.72 is: 203,851.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,316.72 : 390,475.08 = 135,900.72 : x
  2. Step 2: Convert to fraction form
    260,316.72/390,475.08 = 135,900.72/x
  3. Step 3: Cross multiply
    260,316.72x = 390,475.08 × 135,900.72
  4. Step 4: Simplify right side
    260,316.72x = 53,065,844,514.06
  5. Step 5: Solve for x
    x = 53,065,844,514.06/260,316.72
  6. Step 6: Final answer
    x = 203,851.08

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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.