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Finding the Fourth Proportional to 545,814.20, 818,721.30 and 521,319.80

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Solution

The fourth proportional to 545,814.20, 818,721.30 and 521,319.80 is: 781,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,814.20 : 818,721.30 = 521,319.80 : x
  2. Step 2: Convert to fraction form
    545,814.20/818,721.30 = 521,319.80/x
  3. Step 3: Cross multiply
    545,814.20x = 818,721.30 × 521,319.80
  4. Step 4: Simplify right side
    545,814.20x = 426,815,624,371.74
  5. Step 5: Solve for x
    x = 426,815,624,371.74/545,814.20
  6. Step 6: Final answer
    x = 781,979.70

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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.