Home / 999,294.21-1,378,638.77-636,653.16

Finding the Fourth Proportional to 999,294.21, 1,378,638.77 and 636,653.16

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Solution

The fourth proportional to 999,294.21, 1,378,638.77 and 636,653.16 is: 878,334.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,294.21 : 1,378,638.77 = 636,653.16 : x
  2. Step 2: Convert to fraction form
    999,294.21/1,378,638.77 = 636,653.16/x
  3. Step 3: Cross multiply
    999,294.21x = 1,378,638.77 × 636,653.16
  4. Step 4: Simplify right side
    999,294.21x = 877,714,726,235.75
  5. Step 5: Solve for x
    x = 877,714,726,235.75/999,294.21
  6. Step 6: Final answer
    x = 878,334.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.