Home / 718,185.24-991,088.80-391,498.20

Finding the Fourth Proportional to 718,185.24, 991,088.80 and 391,498.20

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Solution

The fourth proportional to 718,185.24, 991,088.80 and 391,498.20 is: 540,263.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,185.24 : 991,088.80 = 391,498.20 : x
  2. Step 2: Convert to fraction form
    718,185.24/991,088.80 = 391,498.20/x
  3. Step 3: Cross multiply
    718,185.24x = 991,088.80 × 391,498.20
  4. Step 4: Simplify right side
    718,185.24x = 388,009,481,240.16
  5. Step 5: Solve for x
    x = 388,009,481,240.16/718,185.24
  6. Step 6: Final answer
    x = 540,263.79

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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.