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Finding the Fourth Proportional to 520,020.90, 778,719.15 and 415,044.90

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Solution

The fourth proportional to 520,020.90, 778,719.15 and 415,044.90 is: 621,520.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,020.90 : 778,719.15 = 415,044.90 : x
  2. Step 2: Convert to fraction form
    520,020.90/778,719.15 = 415,044.90/x
  3. Step 3: Cross multiply
    520,020.90x = 778,719.15 × 415,044.90
  4. Step 4: Simplify right side
    520,020.90x = 323,203,411,739.84
  5. Step 5: Solve for x
    x = 323,203,411,739.84/520,020.90
  6. Step 6: Final answer
    x = 621,520.04

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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.