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Finding the Fourth Proportional to 400,790.19, 553,090.46 and 219,502.55

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Solution

The fourth proportional to 400,790.19, 553,090.46 and 219,502.55 is: 302,913.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,790.19 : 553,090.46 = 219,502.55 : x
  2. Step 2: Convert to fraction form
    400,790.19/553,090.46 = 219,502.55/x
  3. Step 3: Cross multiply
    400,790.19x = 553,090.46 × 219,502.55
  4. Step 4: Simplify right side
    400,790.19x = 121,404,762,487.71
  5. Step 5: Solve for x
    x = 121,404,762,487.71/400,790.19
  6. Step 6: Final answer
    x = 302,913.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.