Home / 718,005.77-990,835.13-391,321.73

Finding the Fourth Proportional to 718,005.77, 990,835.13 and 391,321.73

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Solution

The fourth proportional to 718,005.77, 990,835.13 and 391,321.73 is: 540,017.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,005.77 : 990,835.13 = 391,321.73 : x
  2. Step 2: Convert to fraction form
    718,005.77/990,835.13 = 391,321.73/x
  3. Step 3: Cross multiply
    718,005.77x = 990,835.13 × 391,321.73
  4. Step 4: Simplify right side
    718,005.77x = 387,735,320,671.77
  5. Step 5: Solve for x
    x = 387,735,320,671.77/718,005.77
  6. Step 6: Final answer
    x = 540,017.00

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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.