Home / 391,028.02-539,630.04-221,258.50

Finding the Fourth Proportional to 391,028.02, 539,630.04 and 221,258.50

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Solution

The fourth proportional to 391,028.02, 539,630.04 and 221,258.50 is: 305,343.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,028.02 : 539,630.04 = 221,258.50 : x
  2. Step 2: Convert to fraction form
    391,028.02/539,630.04 = 221,258.50/x
  3. Step 3: Cross multiply
    391,028.02x = 539,630.04 × 221,258.50
  4. Step 4: Simplify right side
    391,028.02x = 119,397,733,205.34
  5. Step 5: Solve for x
    x = 119,397,733,205.34/391,028.02
  6. Step 6: Final answer
    x = 305,343.16

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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.