Home / 858,374.85-1,287,562.28-259,428.45

Finding the Fourth Proportional to 858,374.85, 1,287,562.28 and 259,428.45

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Solution

The fourth proportional to 858,374.85, 1,287,562.28 and 259,428.45 is: 389,142.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,374.85 : 1,287,562.28 = 259,428.45 : x
  2. Step 2: Convert to fraction form
    858,374.85/1,287,562.28 = 259,428.45/x
  3. Step 3: Cross multiply
    858,374.85x = 1,287,562.28 × 259,428.45
  4. Step 4: Simplify right side
    858,374.85x = 334,030,285,281.72
  5. Step 5: Solve for x
    x = 334,030,285,281.72/858,374.85
  6. Step 6: Final answer
    x = 389,142.68

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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.