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Finding the Fourth Proportional to 507,131.45, 699,888.35 and 280,776.95

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Solution

The fourth proportional to 507,131.45, 699,888.35 and 280,776.95 is: 387,498.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,131.45 : 699,888.35 = 280,776.95 : x
  2. Step 2: Convert to fraction form
    507,131.45/699,888.35 = 280,776.95/x
  3. Step 3: Cross multiply
    507,131.45x = 699,888.35 × 280,776.95
  4. Step 4: Simplify right side
    507,131.45x = 196,512,516,253.53
  5. Step 5: Solve for x
    x = 196,512,516,253.53/507,131.45
  6. Step 6: Final answer
    x = 387,498.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.