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Finding the Fourth Proportional to 878,681.77, 1,317,548.72 and 398,647.64

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Solution

The fourth proportional to 878,681.77, 1,317,548.72 and 398,647.64 is: 597,756.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,681.77 : 1,317,548.72 = 398,647.64 : x
  2. Step 2: Convert to fraction form
    878,681.77/1,317,548.72 = 398,647.64/x
  3. Step 3: Cross multiply
    878,681.77x = 1,317,548.72 × 398,647.64
  4. Step 4: Simplify right side
    878,681.77x = 525,237,681,225.28
  5. Step 5: Solve for x
    x = 525,237,681,225.28/878,681.77
  6. Step 6: Final answer
    x = 597,756.43

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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.