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Finding the Fourth Proportional to 260,647.20, 390,970.80 and 73,658.70

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Solution

The fourth proportional to 260,647.20, 390,970.80 and 73,658.70 is: 110,488.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,647.20 : 390,970.80 = 73,658.70 : x
  2. Step 2: Convert to fraction form
    260,647.20/390,970.80 = 73,658.70/x
  3. Step 3: Cross multiply
    260,647.20x = 390,970.80 × 73,658.70
  4. Step 4: Simplify right side
    260,647.20x = 28,798,400,865.96
  5. Step 5: Solve for x
    x = 28,798,400,865.96/260,647.20
  6. Step 6: Final answer
    x = 110,488.05

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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.