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Finding the Fourth Proportional to 545,276.80, 817,915.20 and 377,315.20

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Solution

The fourth proportional to 545,276.80, 817,915.20 and 377,315.20 is: 565,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,276.80 : 817,915.20 = 377,315.20 : x
  2. Step 2: Convert to fraction form
    545,276.80/817,915.20 = 377,315.20/x
  3. Step 3: Cross multiply
    545,276.80x = 817,915.20 × 377,315.20
  4. Step 4: Simplify right side
    545,276.80x = 308,611,837,271.04
  5. Step 5: Solve for x
    x = 308,611,837,271.04/545,276.80
  6. Step 6: Final answer
    x = 565,972.80

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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.