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Finding the Fourth Proportional to 520,074.30, 778,945.05 and 426,762.30

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Solution

The fourth proportional to 520,074.30, 778,945.05 and 426,762.30 is: 639,186.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,074.30 : 778,945.05 = 426,762.30 : x
  2. Step 2: Convert to fraction form
    520,074.30/778,945.05 = 426,762.30/x
  3. Step 3: Cross multiply
    520,074.30x = 778,945.05 × 426,762.30
  4. Step 4: Simplify right side
    520,074.30x = 332,424,381,111.62
  5. Step 5: Solve for x
    x = 332,424,381,111.62/520,074.30
  6. Step 6: Final answer
    x = 639,186.33

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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.