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Finding the Fourth Proportional to 457,751.20, 686,626.80 and 316,033.60

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Solution

The fourth proportional to 457,751.20, 686,626.80 and 316,033.60 is: 474,050.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,751.20 : 686,626.80 = 316,033.60 : x
  2. Step 2: Convert to fraction form
    457,751.20/686,626.80 = 316,033.60/x
  3. Step 3: Cross multiply
    457,751.20x = 686,626.80 × 316,033.60
  4. Step 4: Simplify right side
    457,751.20x = 216,997,139,460.48
  5. Step 5: Solve for x
    x = 216,997,139,460.48/457,751.20
  6. Step 6: Final answer
    x = 474,050.40

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Similar ratio
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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.