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Finding the Fourth Proportional to 663,443.80, 997,623.30 and 555,309.40

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Solution

The fourth proportional to 663,443.80, 997,623.30 and 555,309.40 is: 835,021.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,443.80 : 997,623.30 = 555,309.40 : x
  2. Step 2: Convert to fraction form
    663,443.80/997,623.30 = 555,309.40/x
  3. Step 3: Cross multiply
    663,443.80x = 997,623.30 × 555,309.40
  4. Step 4: Simplify right side
    663,443.80x = 553,989,596,149.02
  5. Step 5: Solve for x
    x = 553,989,596,149.02/663,443.80
  6. Step 6: Final answer
    x = 835,021.14

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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.