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Finding the Fourth Proportional to 260,115.53, 390,199.28 and 70,578.90

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Solution

The fourth proportional to 260,115.53, 390,199.28 and 70,578.90 is: 105,875.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,115.53 : 390,199.28 = 70,578.90 : x
  2. Step 2: Convert to fraction form
    260,115.53/390,199.28 = 70,578.90/x
  3. Step 3: Cross multiply
    260,115.53x = 390,199.28 × 70,578.90
  4. Step 4: Simplify right side
    260,115.53x = 27,539,835,610.30
  5. Step 5: Solve for x
    x = 27,539,835,610.30/260,115.53
  6. Step 6: Final answer
    x = 105,875.40

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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.