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Finding the Fourth Proportional to 519,816.30, 779,724.45 and 319,487.10

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Solution

The fourth proportional to 519,816.30, 779,724.45 and 319,487.10 is: 479,230.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,816.30 : 779,724.45 = 319,487.10 : x
  2. Step 2: Convert to fraction form
    519,816.30/779,724.45 = 319,487.10/x
  3. Step 3: Cross multiply
    519,816.30x = 779,724.45 × 319,487.10
  4. Step 4: Simplify right side
    519,816.30x = 249,111,903,329.60
  5. Step 5: Solve for x
    x = 249,111,903,329.60/519,816.30
  6. Step 6: Final answer
    x = 479,230.65

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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.