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Finding the Fourth Proportional to 543,223.80, 814,835.70 and 520,187.40

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Solution

The fourth proportional to 543,223.80, 814,835.70 and 520,187.40 is: 780,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,223.80 : 814,835.70 = 520,187.40 : x
  2. Step 2: Convert to fraction form
    543,223.80/814,835.70 = 520,187.40/x
  3. Step 3: Cross multiply
    543,223.80x = 814,835.70 × 520,187.40
  4. Step 4: Simplify right side
    543,223.80x = 423,867,264,210.18
  5. Step 5: Solve for x
    x = 423,867,264,210.18/543,223.80
  6. Step 6: Final answer
    x = 780,281.10

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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.