Home / 688,509.70-1,032,764.55-289,600.90

Finding the Fourth Proportional to 688,509.70, 1,032,764.55 and 289,600.90

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Solution

The fourth proportional to 688,509.70, 1,032,764.55 and 289,600.90 is: 434,401.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,509.70 : 1,032,764.55 = 289,600.90 : x
  2. Step 2: Convert to fraction form
    688,509.70/1,032,764.55 = 289,600.90/x
  3. Step 3: Cross multiply
    688,509.70x = 1,032,764.55 × 289,600.90
  4. Step 4: Simplify right side
    688,509.70x = 299,089,543,168.10
  5. Step 5: Solve for x
    x = 299,089,543,168.10/688,509.70
  6. Step 6: Final answer
    x = 434,401.35

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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.