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Finding the Fourth Proportional to 209,628.40, 314,442.60 and 146,642.80

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Solution

The fourth proportional to 209,628.40, 314,442.60 and 146,642.80 is: 219,964.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,628.40 : 314,442.60 = 146,642.80 : x
  2. Step 2: Convert to fraction form
    209,628.40/314,442.60 = 146,642.80/x
  3. Step 3: Cross multiply
    209,628.40x = 314,442.60 × 146,642.80
  4. Step 4: Simplify right side
    209,628.40x = 46,110,743,303.28
  5. Step 5: Solve for x
    x = 46,110,743,303.28/209,628.40
  6. Step 6: Final answer
    x = 219,964.20

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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.