Home / 642,140.06-885,132.77-505,962.86

Finding the Fourth Proportional to 642,140.06, 885,132.77 and 505,962.86

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Solution

The fourth proportional to 642,140.06, 885,132.77 and 505,962.86 is: 697,424.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,140.06 : 885,132.77 = 505,962.86 : x
  2. Step 2: Convert to fraction form
    642,140.06/885,132.77 = 505,962.86/x
  3. Step 3: Cross multiply
    642,140.06x = 885,132.77 × 505,962.86
  4. Step 4: Simplify right side
    642,140.06x = 447,844,300,833.44
  5. Step 5: Solve for x
    x = 447,844,300,833.44/642,140.06
  6. Step 6: Final answer
    x = 697,424.65

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1.5x scale

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.