Home / 744,342.20-1,116,513.30-428,539.40

Finding the Fourth Proportional to 744,342.20, 1,116,513.30 and 428,539.40

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Solution

The fourth proportional to 744,342.20, 1,116,513.30 and 428,539.40 is: 642,809.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,342.20 : 1,116,513.30 = 428,539.40 : x
  2. Step 2: Convert to fraction form
    744,342.20/1,116,513.30 = 428,539.40/x
  3. Step 3: Cross multiply
    744,342.20x = 1,116,513.30 × 428,539.40
  4. Step 4: Simplify right side
    744,342.20x = 478,469,939,674.02
  5. Step 5: Solve for x
    x = 478,469,939,674.02/744,342.20
  6. Step 6: Final answer
    x = 642,809.10

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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.