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Finding the Fourth Proportional to 520,045.90, 780,328.05 and 295,578.70

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Solution

The fourth proportional to 520,045.90, 780,328.05 and 295,578.70 is: 443,515.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,045.90 : 780,328.05 = 295,578.70 : x
  2. Step 2: Convert to fraction form
    520,045.90/780,328.05 = 295,578.70/x
  3. Step 3: Cross multiply
    520,045.90x = 780,328.05 × 295,578.70
  4. Step 4: Simplify right side
    520,045.90x = 230,648,350,592.54
  5. Step 5: Solve for x
    x = 230,648,350,592.54/520,045.90
  6. Step 6: Final answer
    x = 443,515.37

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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.