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Finding the Fourth Proportional to 494,893.20, 742,339.80 and 317,746.20

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Solution

The fourth proportional to 494,893.20, 742,339.80 and 317,746.20 is: 476,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,893.20 : 742,339.80 = 317,746.20 : x
  2. Step 2: Convert to fraction form
    494,893.20/742,339.80 = 317,746.20/x
  3. Step 3: Cross multiply
    494,893.20x = 742,339.80 × 317,746.20
  4. Step 4: Simplify right side
    494,893.20x = 235,875,650,558.76
  5. Step 5: Solve for x
    x = 235,875,650,558.76/494,893.20
  6. Step 6: Final answer
    x = 476,619.30

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Double scale
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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.