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Finding the Fourth Proportional to 578,381.80, 866,420.70 and 509,108.20

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Solution

The fourth proportional to 578,381.80, 866,420.70 and 509,108.20 is: 762,648.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,381.80 : 866,420.70 = 509,108.20 : x
  2. Step 2: Convert to fraction form
    578,381.80/866,420.70 = 509,108.20/x
  3. Step 3: Cross multiply
    578,381.80x = 866,420.70 × 509,108.20
  4. Step 4: Simplify right side
    578,381.80x = 441,101,883,019.74
  5. Step 5: Solve for x
    x = 441,101,883,019.74/578,381.80
  6. Step 6: Final answer
    x = 762,648.28

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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.