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Finding the Fourth Proportional to 545,411.70, 818,117.55 and 320,879.70

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Solution

The fourth proportional to 545,411.70, 818,117.55 and 320,879.70 is: 481,319.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,411.70 : 818,117.55 = 320,879.70 : x
  2. Step 2: Convert to fraction form
    545,411.70/818,117.55 = 320,879.70/x
  3. Step 3: Cross multiply
    545,411.70x = 818,117.55 × 320,879.70
  4. Step 4: Simplify right side
    545,411.70x = 262,517,314,008.74
  5. Step 5: Solve for x
    x = 262,517,314,008.74/545,411.70
  6. Step 6: Final answer
    x = 481,319.55

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Similar ratio
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1.5x scale

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.