Home / 915,539.40-1,372,920.30-442,369.80

Finding the Fourth Proportional to 915,539.40, 1,372,920.30 and 442,369.80

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Solution

The fourth proportional to 915,539.40, 1,372,920.30 and 442,369.80 is: 663,366.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,539.40 : 1,372,920.30 = 442,369.80 : x
  2. Step 2: Convert to fraction form
    915,539.40/1,372,920.30 = 442,369.80/x
  3. Step 3: Cross multiply
    915,539.40x = 1,372,920.30 × 442,369.80
  4. Step 4: Simplify right side
    915,539.40x = 607,338,478,526.94
  5. Step 5: Solve for x
    x = 607,338,478,526.94/915,539.40
  6. Step 6: Final answer
    x = 663,366.84

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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.