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Finding the Fourth Proportional to 521,063.28, 780,189.30 and 340,701.12

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Solution

The fourth proportional to 521,063.28, 780,189.30 and 340,701.12 is: 510,132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,063.28 : 780,189.30 = 340,701.12 : x
  2. Step 2: Convert to fraction form
    521,063.28/780,189.30 = 340,701.12/x
  3. Step 3: Cross multiply
    521,063.28x = 780,189.30 × 340,701.12
  4. Step 4: Simplify right side
    521,063.28x = 265,811,368,322.02
  5. Step 5: Solve for x
    x = 265,811,368,322.02/521,063.28
  6. Step 6: Final answer
    x = 510,132.60

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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.