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Finding the Fourth Proportional to 520,086.94, 780,074.52 and 352,681.81

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Solution

The fourth proportional to 520,086.94, 780,074.52 and 352,681.81 is: 528,984.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,086.94 : 780,074.52 = 352,681.81 : x
  2. Step 2: Convert to fraction form
    520,086.94/780,074.52 = 352,681.81/x
  3. Step 3: Cross multiply
    520,086.94x = 780,074.52 × 352,681.81
  4. Step 4: Simplify right side
    520,086.94x = 275,118,093,648.48
  5. Step 5: Solve for x
    x = 275,118,093,648.48/520,086.94
  6. Step 6: Final answer
    x = 528,984.81

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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.