Home / 858,705.40-1,287,021.30-437,764.60

Finding the Fourth Proportional to 858,705.40, 1,287,021.30 and 437,764.60

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Solution

The fourth proportional to 858,705.40, 1,287,021.30 and 437,764.60 is: 656,118.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,705.40 : 1,287,021.30 = 437,764.60 : x
  2. Step 2: Convert to fraction form
    858,705.40/1,287,021.30 = 437,764.60/x
  3. Step 3: Cross multiply
    858,705.40x = 1,287,021.30 × 437,764.60
  4. Step 4: Simplify right side
    858,705.40x = 563,412,364,585.98
  5. Step 5: Solve for x
    x = 563,412,364,585.98/858,705.40
  6. Step 6: Final answer
    x = 656,118.34

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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.