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Finding the Fourth Proportional to 341,308.50, 511,962.75 and 91,990.50

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Solution

The fourth proportional to 341,308.50, 511,962.75 and 91,990.50 is: 137,985.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,308.50 : 511,962.75 = 91,990.50 : x
  2. Step 2: Convert to fraction form
    341,308.50/511,962.75 = 91,990.50/x
  3. Step 3: Cross multiply
    341,308.50x = 511,962.75 × 91,990.50
  4. Step 4: Simplify right side
    341,308.50x = 47,095,709,353.88
  5. Step 5: Solve for x
    x = 47,095,709,353.88/341,308.50
  6. Step 6: Final answer
    x = 137,985.75

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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.