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Finding the Fourth Proportional to 553,370.37, 830,055.72 and 427,194.78

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Solution

The fourth proportional to 553,370.37, 830,055.72 and 427,194.78 is: 640,792.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,370.37 : 830,055.72 = 427,194.78 : x
  2. Step 2: Convert to fraction form
    553,370.37/830,055.72 = 427,194.78/x
  3. Step 3: Cross multiply
    553,370.37x = 830,055.72 × 427,194.78
  4. Step 4: Simplify right side
    553,370.37x = 354,595,470,693.14
  5. Step 5: Solve for x
    x = 354,595,470,693.14/553,370.37
  6. Step 6: Final answer
    x = 640,792.30

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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.