Home / 858,642.60-1,288,109.70-459,174.90

Finding the Fourth Proportional to 858,642.60, 1,288,109.70 and 459,174.90

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Solution

The fourth proportional to 858,642.60, 1,288,109.70 and 459,174.90 is: 688,840.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,642.60 : 1,288,109.70 = 459,174.90 : x
  2. Step 2: Convert to fraction form
    858,642.60/1,288,109.70 = 459,174.90/x
  3. Step 3: Cross multiply
    858,642.60x = 1,288,109.70 × 459,174.90
  4. Step 4: Simplify right side
    858,642.60x = 591,467,642,686.53
  5. Step 5: Solve for x
    x = 591,467,642,686.53/858,642.60
  6. Step 6: Final answer
    x = 688,840.32

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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.