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Finding the Fourth Proportional to 660,179.20, 990,341.70 and 210,823.60

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Solution

The fourth proportional to 660,179.20, 990,341.70 and 210,823.60 is: 316,258.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,179.20 : 990,341.70 = 210,823.60 : x
  2. Step 2: Convert to fraction form
    660,179.20/990,341.70 = 210,823.60/x
  3. Step 3: Cross multiply
    660,179.20x = 990,341.70 × 210,823.60
  4. Step 4: Simplify right side
    660,179.20x = 208,787,402,424.12
  5. Step 5: Solve for x
    x = 208,787,402,424.12/660,179.20
  6. Step 6: Final answer
    x = 316,258.68

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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.