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Finding the Fourth Proportional to 520,090.80, 781,885.80 and 443,108.40

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Solution

The fourth proportional to 520,090.80, 781,885.80 and 443,108.40 is: 666,153.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,090.80 : 781,885.80 = 443,108.40 : x
  2. Step 2: Convert to fraction form
    520,090.80/781,885.80 = 443,108.40/x
  3. Step 3: Cross multiply
    520,090.80x = 781,885.80 × 443,108.40
  4. Step 4: Simplify right side
    520,090.80x = 346,460,165,820.72
  5. Step 5: Solve for x
    x = 346,460,165,820.72/520,090.80
  6. Step 6: Final answer
    x = 666,153.23

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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.