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Finding the Fourth Proportional to 427,277.40, 640,973.70 and 146,880.60

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Solution

The fourth proportional to 427,277.40, 640,973.70 and 146,880.60 is: 220,340.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,277.40 : 640,973.70 = 146,880.60 : x
  2. Step 2: Convert to fraction form
    427,277.40/640,973.70 = 146,880.60/x
  3. Step 3: Cross multiply
    427,277.40x = 640,973.70 × 146,880.60
  4. Step 4: Simplify right side
    427,277.40x = 94,146,601,640.22
  5. Step 5: Solve for x
    x = 94,146,601,640.22/427,277.40
  6. Step 6: Final answer
    x = 220,340.70

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1.5x scale

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.