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Finding the Fourth Proportional to 545,259.20, 816,139.20 and 426,286.40

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Solution

The fourth proportional to 545,259.20, 816,139.20 and 426,286.40 is: 638,061.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,259.20 : 816,139.20 = 426,286.40 : x
  2. Step 2: Convert to fraction form
    545,259.20/816,139.20 = 426,286.40/x
  3. Step 3: Cross multiply
    545,259.20x = 816,139.20 × 426,286.40
  4. Step 4: Simplify right side
    545,259.20x = 347,909,041,466.88
  5. Step 5: Solve for x
    x = 347,909,041,466.88/545,259.20
  6. Step 6: Final answer
    x = 638,061.75

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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.