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Finding the Fourth Proportional to 280,021.40, 420,032.10 and 236,281.40

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Solution

The fourth proportional to 280,021.40, 420,032.10 and 236,281.40 is: 354,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,021.40 : 420,032.10 = 236,281.40 : x
  2. Step 2: Convert to fraction form
    280,021.40/420,032.10 = 236,281.40/x
  3. Step 3: Cross multiply
    280,021.40x = 420,032.10 × 236,281.40
  4. Step 4: Simplify right side
    280,021.40x = 99,245,772,632.94
  5. Step 5: Solve for x
    x = 99,245,772,632.94/280,021.40
  6. Step 6: Final answer
    x = 354,422.10

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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.