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Finding the Fourth Proportional to 520,828.81, 780,350.33 and 349,729.81

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Solution

The fourth proportional to 520,828.81, 780,350.33 and 349,729.81 is: 523,995.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,828.81 : 780,350.33 = 349,729.81 : x
  2. Step 2: Convert to fraction form
    520,828.81/780,350.33 = 349,729.81/x
  3. Step 3: Cross multiply
    520,828.81x = 780,350.33 × 349,729.81
  4. Step 4: Simplify right side
    520,828.81x = 272,911,772,644.34
  5. Step 5: Solve for x
    x = 272,911,772,644.34/520,828.81
  6. Step 6: Final answer
    x = 523,995.15

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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.