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Finding the Fourth Proportional to 603,619.20, 905,428.80 and 535,384.80

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Solution

The fourth proportional to 603,619.20, 905,428.80 and 535,384.80 is: 803,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,619.20 : 905,428.80 = 535,384.80 : x
  2. Step 2: Convert to fraction form
    603,619.20/905,428.80 = 535,384.80/x
  3. Step 3: Cross multiply
    603,619.20x = 905,428.80 × 535,384.80
  4. Step 4: Simplify right side
    603,619.20x = 484,752,817,002.24
  5. Step 5: Solve for x
    x = 484,752,817,002.24/603,619.20
  6. Step 6: Final answer
    x = 803,077.20

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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.