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Finding the Fourth Proportional to 642,855.40, 964,110.30 and 193,575.40

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Solution

The fourth proportional to 642,855.40, 964,110.30 and 193,575.40 is: 290,311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,855.40 : 964,110.30 = 193,575.40 : x
  2. Step 2: Convert to fraction form
    642,855.40/964,110.30 = 193,575.40/x
  3. Step 3: Cross multiply
    642,855.40x = 964,110.30 × 193,575.40
  4. Step 4: Simplify right side
    642,855.40x = 186,628,036,966.62
  5. Step 5: Solve for x
    x = 186,628,036,966.62/642,855.40
  6. Step 6: Final answer
    x = 290,311.07

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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.