Home / 718,296.24-991,218.90-391,602.16

Finding the Fourth Proportional to 718,296.24, 991,218.90 and 391,602.16

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Solution

The fourth proportional to 718,296.24, 991,218.90 and 391,602.16 is: 540,394.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,296.24 : 991,218.90 = 391,602.16 : x
  2. Step 2: Convert to fraction form
    718,296.24/991,218.90 = 391,602.16/x
  3. Step 3: Cross multiply
    718,296.24x = 991,218.90 × 391,602.16
  4. Step 4: Simplify right side
    718,296.24x = 388,163,462,272.82
  5. Step 5: Solve for x
    x = 388,163,462,272.82/718,296.24
  6. Step 6: Final answer
    x = 540,394.67

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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.