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Finding the Fourth Proportional to 553,434.08, 830,151.32 and 427,258.56

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Solution

The fourth proportional to 553,434.08, 830,151.32 and 427,258.56 is: 640,887.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,434.08 : 830,151.32 = 427,258.56 : x
  2. Step 2: Convert to fraction form
    553,434.08/830,151.32 = 427,258.56/x
  3. Step 3: Cross multiply
    553,434.08x = 830,151.32 × 427,258.56
  4. Step 4: Simplify right side
    553,434.08x = 354,689,257,565.30
  5. Step 5: Solve for x
    x = 354,689,257,565.30/553,434.08
  6. Step 6: Final answer
    x = 640,887.99

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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.