Home / 391,515.36-540,515.04-257,768.16

Finding the Fourth Proportional to 391,515.36, 540,515.04 and 257,768.16

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Solution

The fourth proportional to 391,515.36, 540,515.04 and 257,768.16 is: 355,867.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,515.36 : 540,515.04 = 257,768.16 : x
  2. Step 2: Convert to fraction form
    391,515.36/540,515.04 = 257,768.16/x
  3. Step 3: Cross multiply
    391,515.36x = 540,515.04 × 257,768.16
  4. Step 4: Simplify right side
    391,515.36x = 139,327,567,313.13
  5. Step 5: Solve for x
    x = 139,327,567,313.13/391,515.36
  6. Step 6: Final answer
    x = 355,867.44

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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.