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Finding the Fourth Proportional to 403,210.40, 604,815.60 and 206,602.40

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Solution

The fourth proportional to 403,210.40, 604,815.60 and 206,602.40 is: 309,903.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,210.40 : 604,815.60 = 206,602.40 : x
  2. Step 2: Convert to fraction form
    403,210.40/604,815.60 = 206,602.40/x
  3. Step 3: Cross multiply
    403,210.40x = 604,815.60 × 206,602.40
  4. Step 4: Simplify right side
    403,210.40x = 124,956,354,517.44
  5. Step 5: Solve for x
    x = 124,956,354,517.44/403,210.40
  6. Step 6: Final answer
    x = 309,903.60

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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.