Home / 859,495.18-1,288,441.44-290,478.40

Finding the Fourth Proportional to 859,495.18, 1,288,441.44 and 290,478.40

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Solution

The fourth proportional to 859,495.18, 1,288,441.44 and 290,478.40 is: 435,446.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,495.18 : 1,288,441.44 = 290,478.40 : x
  2. Step 2: Convert to fraction form
    859,495.18/1,288,441.44 = 290,478.40/x
  3. Step 3: Cross multiply
    859,495.18x = 1,288,441.44 × 290,478.40
  4. Step 4: Simplify right side
    859,495.18x = 374,264,407,984.90
  5. Step 5: Solve for x
    x = 374,264,407,984.90/859,495.18
  6. Step 6: Final answer
    x = 435,446.78

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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.