Home / 391,050.02-539,660.40-221,280.50

Finding the Fourth Proportional to 391,050.02, 539,660.40 and 221,280.50

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Solution

The fourth proportional to 391,050.02, 539,660.40 and 221,280.50 is: 305,373.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,050.02 : 539,660.40 = 221,280.50 : x
  2. Step 2: Convert to fraction form
    391,050.02/539,660.40 = 221,280.50/x
  3. Step 3: Cross multiply
    391,050.02x = 539,660.40 × 221,280.50
  4. Step 4: Simplify right side
    391,050.02x = 119,416,323,142.20
  5. Step 5: Solve for x
    x = 119,416,323,142.20/391,050.02
  6. Step 6: Final answer
    x = 305,373.53

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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.