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Finding the Fourth Proportional to 642,808.40, 964,039.80 and 193,528.40

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Solution

The fourth proportional to 642,808.40, 964,039.80 and 193,528.40 is: 290,240.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,808.40 : 964,039.80 = 193,528.40 : x
  2. Step 2: Convert to fraction form
    642,808.40/964,039.80 = 193,528.40/x
  3. Step 3: Cross multiply
    642,808.40x = 964,039.80 × 193,528.40
  4. Step 4: Simplify right side
    642,808.40x = 186,569,080,030.32
  5. Step 5: Solve for x
    x = 186,569,080,030.32/642,808.40
  6. Step 6: Final answer
    x = 290,240.58

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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.