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Finding the Fourth Proportional to 519,812.60, 779,718.90 and 320,358.20

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Solution

The fourth proportional to 519,812.60, 779,718.90 and 320,358.20 is: 480,537.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,812.60 : 779,718.90 = 320,358.20 : x
  2. Step 2: Convert to fraction form
    519,812.60/779,718.90 = 320,358.20/x
  3. Step 3: Cross multiply
    519,812.60x = 779,718.90 × 320,358.20
  4. Step 4: Simplify right side
    519,812.60x = 249,789,343,309.98
  5. Step 5: Solve for x
    x = 249,789,343,309.98/519,812.60
  6. Step 6: Final answer
    x = 480,537.30

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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.