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Finding the Fourth Proportional to 519,762.30, 779,643.45 and 319,433.10

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Solution

The fourth proportional to 519,762.30, 779,643.45 and 319,433.10 is: 479,149.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,762.30 : 779,643.45 = 319,433.10 : x
  2. Step 2: Convert to fraction form
    519,762.30/779,643.45 = 319,433.10/x
  3. Step 3: Cross multiply
    519,762.30x = 779,643.45 × 319,433.10
  4. Step 4: Simplify right side
    519,762.30x = 249,043,924,128.20
  5. Step 5: Solve for x
    x = 249,043,924,128.20/519,762.30
  6. Step 6: Final answer
    x = 479,149.65

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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.