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Finding the Fourth Proportional to 878,909.40, 1,318,364.10 and 524,615.40

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Solution

The fourth proportional to 878,909.40, 1,318,364.10 and 524,615.40 is: 786,923.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,909.40 : 1,318,364.10 = 524,615.40 : x
  2. Step 2: Convert to fraction form
    878,909.40/1,318,364.10 = 524,615.40/x
  3. Step 3: Cross multiply
    878,909.40x = 1,318,364.10 × 524,615.40
  4. Step 4: Simplify right side
    878,909.40x = 691,634,109,667.14
  5. Step 5: Solve for x
    x = 691,634,109,667.14/878,909.40
  6. Step 6: Final answer
    x = 786,923.10

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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.