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Finding the Fourth Proportional to 459,979.70, 689,969.55 and 439,312.55

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Solution

The fourth proportional to 459,979.70, 689,969.55 and 439,312.55 is: 658,968.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,979.70 : 689,969.55 = 439,312.55 : x
  2. Step 2: Convert to fraction form
    459,979.70/689,969.55 = 439,312.55/x
  3. Step 3: Cross multiply
    459,979.70x = 689,969.55 × 439,312.55
  4. Step 4: Simplify right side
    459,979.70x = 303,112,282,432.85
  5. Step 5: Solve for x
    x = 303,112,282,432.85/459,979.70
  6. Step 6: Final answer
    x = 658,968.83

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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.