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Finding the Fourth Proportional to 520,048.90, 778,761.15 and 415,072.90

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Solution

The fourth proportional to 520,048.90, 778,761.15 and 415,072.90 is: 621,562.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,048.90 : 778,761.15 = 415,072.90 : x
  2. Step 2: Convert to fraction form
    520,048.90/778,761.15 = 415,072.90/x
  3. Step 3: Cross multiply
    520,048.90x = 778,761.15 × 415,072.90
  4. Step 4: Simplify right side
    520,048.90x = 323,242,648,937.84
  5. Step 5: Solve for x
    x = 323,242,648,937.84/520,048.90
  6. Step 6: Final answer
    x = 621,562.03

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1.5x scale

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.