Home / 718,297.24-991,220.28-391,603.16

Finding the Fourth Proportional to 718,297.24, 991,220.28 and 391,603.16

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Solution

The fourth proportional to 718,297.24, 991,220.28 and 391,603.16 is: 540,396.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,297.24 : 991,220.28 = 391,603.16 : x
  2. Step 2: Convert to fraction form
    718,297.24/991,220.28 = 391,603.16/x
  3. Step 3: Cross multiply
    718,297.24x = 991,220.28 × 391,603.16
  4. Step 4: Simplify right side
    718,297.24x = 388,164,993,904.09
  5. Step 5: Solve for x
    x = 388,164,993,904.09/718,297.24
  6. Step 6: Final answer
    x = 540,396.05

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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.