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Finding the Fourth Proportional to 516,403.80, 774,605.70 and 374,686.20

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Solution

The fourth proportional to 516,403.80, 774,605.70 and 374,686.20 is: 562,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,403.80 : 774,605.70 = 374,686.20 : x
  2. Step 2: Convert to fraction form
    516,403.80/774,605.70 = 374,686.20/x
  3. Step 3: Cross multiply
    516,403.80x = 774,605.70 × 374,686.20
  4. Step 4: Simplify right side
    516,403.80x = 290,234,066,231.34
  5. Step 5: Solve for x
    x = 290,234,066,231.34/516,403.80
  6. Step 6: Final answer
    x = 562,029.30

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Similar ratio
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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.