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Finding the Fourth Proportional to 500,745.08, 691,005.66 and 274,385.72

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Solution

The fourth proportional to 500,745.08, 691,005.66 and 274,385.72 is: 378,639.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,745.08 : 691,005.66 = 274,385.72 : x
  2. Step 2: Convert to fraction form
    500,745.08/691,005.66 = 274,385.72/x
  3. Step 3: Cross multiply
    500,745.08x = 691,005.66 × 274,385.72
  4. Step 4: Simplify right side
    500,745.08x = 189,602,085,543.18
  5. Step 5: Solve for x
    x = 189,602,085,543.18/500,745.08
  6. Step 6: Final answer
    x = 378,639.94

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1.5x scale

Why These Related Problems?

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