Home / 459,319.40-689,000.70-143,786.60

Finding the Fourth Proportional to 459,319.40, 689,000.70 and 143,786.60

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Solution

The fourth proportional to 459,319.40, 689,000.70 and 143,786.60 is: 215,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,319.40 : 689,000.70 = 143,786.60 : x
  2. Step 2: Convert to fraction form
    459,319.40/689,000.70 = 143,786.60/x
  3. Step 3: Cross multiply
    459,319.40x = 689,000.70 × 143,786.60
  4. Step 4: Simplify right side
    459,319.40x = 99,069,068,050.62
  5. Step 5: Solve for x
    x = 99,069,068,050.62/459,319.40
  6. Step 6: Final answer
    x = 215,686.66

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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.