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Finding the Fourth Proportional to 415,622.79, 623,210.63 and 215,446.95

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Solution

The fourth proportional to 415,622.79, 623,210.63 and 215,446.95 is: 323,054.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,622.79 : 623,210.63 = 215,446.95 : x
  2. Step 2: Convert to fraction form
    415,622.79/623,210.63 = 215,446.95/x
  3. Step 3: Cross multiply
    415,622.79x = 623,210.63 × 215,446.95
  4. Step 4: Simplify right side
    415,622.79x = 134,268,828,363.84
  5. Step 5: Solve for x
    x = 134,268,828,363.84/415,622.79
  6. Step 6: Final answer
    x = 323,054.54

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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.