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Finding the Fourth Proportional to 280,019.40, 421,065.90 and 234,400.20

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Solution

The fourth proportional to 280,019.40, 421,065.90 and 234,400.20 is: 352,468.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,019.40 : 421,065.90 = 234,400.20 : x
  2. Step 2: Convert to fraction form
    280,019.40/421,065.90 = 234,400.20/x
  3. Step 3: Cross multiply
    280,019.40x = 421,065.90 × 234,400.20
  4. Step 4: Simplify right side
    280,019.40x = 98,697,931,173.18
  5. Step 5: Solve for x
    x = 98,697,931,173.18/280,019.40
  6. Step 6: Final answer
    x = 352,468.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.