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Finding the Fourth Proportional to 490,117.68, 676,509.08 and 286,223.60

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Solution

The fourth proportional to 490,117.68, 676,509.08 and 286,223.60 is: 395,074.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,117.68 : 676,509.08 = 286,223.60 : x
  2. Step 2: Convert to fraction form
    490,117.68/676,509.08 = 286,223.60/x
  3. Step 3: Cross multiply
    490,117.68x = 676,509.08 × 286,223.60
  4. Step 4: Simplify right side
    490,117.68x = 193,632,864,310.29
  5. Step 5: Solve for x
    x = 193,632,864,310.29/490,117.68
  6. Step 6: Final answer
    x = 395,074.23

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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.