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Finding the Fourth Proportional to 260,307.20, 390,460.80 and 155,244.80

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Solution

The fourth proportional to 260,307.20, 390,460.80 and 155,244.80 is: 232,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,307.20 : 390,460.80 = 155,244.80 : x
  2. Step 2: Convert to fraction form
    260,307.20/390,460.80 = 155,244.80/x
  3. Step 3: Cross multiply
    260,307.20x = 390,460.80 × 155,244.80
  4. Step 4: Simplify right side
    260,307.20x = 60,617,008,803.84
  5. Step 5: Solve for x
    x = 60,617,008,803.84/260,307.20
  6. Step 6: Final answer
    x = 232,867.20

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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.