Home / 718,186.24-991,090.18-391,499.20

Finding the Fourth Proportional to 718,186.24, 991,090.18 and 391,499.20

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Solution

The fourth proportional to 718,186.24, 991,090.18 and 391,499.20 is: 540,265.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,186.24 : 991,090.18 = 391,499.20 : x
  2. Step 2: Convert to fraction form
    718,186.24/991,090.18 = 391,499.20/x
  3. Step 3: Cross multiply
    718,186.24x = 991,090.18 × 391,499.20
  4. Step 4: Simplify right side
    718,186.24x = 388,011,012,597.86
  5. Step 5: Solve for x
    x = 388,011,012,597.86/718,186.24
  6. Step 6: Final answer
    x = 540,265.17

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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.