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Finding the Fourth Proportional to 871,880.80, 1,308,037.20 and 398,466.40

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Solution

The fourth proportional to 871,880.80, 1,308,037.20 and 398,466.40 is: 597,798.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,880.80 : 1,308,037.20 = 398,466.40 : x
  2. Step 2: Convert to fraction form
    871,880.80/1,308,037.20 = 398,466.40/x
  3. Step 3: Cross multiply
    871,880.80x = 1,308,037.20 × 398,466.40
  4. Step 4: Simplify right side
    871,880.80x = 521,208,874,150.08
  5. Step 5: Solve for x
    x = 521,208,874,150.08/871,880.80
  6. Step 6: Final answer
    x = 597,798.32

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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.