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Finding the Fourth Proportional to 545,318.40, 752,520.96 and 306,808.32

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Solution

The fourth proportional to 545,318.40, 752,520.96 and 306,808.32 is: 423,385.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,318.40 : 752,520.96 = 306,808.32 : x
  2. Step 2: Convert to fraction form
    545,318.40/752,520.96 = 306,808.32/x
  3. Step 3: Cross multiply
    545,318.40x = 752,520.96 × 306,808.32
  4. Step 4: Simplify right side
    545,318.40x = 230,879,691,502.39
  5. Step 5: Solve for x
    x = 230,879,691,502.39/545,318.40
  6. Step 6: Final answer
    x = 423,385.11

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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.