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Finding the Fourth Proportional to 520,315.86, 779,852.55 and 267,717.36

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Solution

The fourth proportional to 520,315.86, 779,852.55 and 267,717.36 is: 401,256.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,315.86 : 779,852.55 = 267,717.36 : x
  2. Step 2: Convert to fraction form
    520,315.86/779,852.55 = 267,717.36/x
  3. Step 3: Cross multiply
    520,315.86x = 779,852.55 × 267,717.36
  4. Step 4: Simplify right side
    520,315.86x = 208,780,065,875.27
  5. Step 5: Solve for x
    x = 208,780,065,875.27/520,315.86
  6. Step 6: Final answer
    x = 401,256.39

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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.