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Finding the Fourth Proportional to 519,782.90, 779,218.80 and 249,776.55

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Solution

The fourth proportional to 519,782.90, 779,218.80 and 249,776.55 is: 374,445.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,782.90 : 779,218.80 = 249,776.55 : x
  2. Step 2: Convert to fraction form
    519,782.90/779,218.80 = 249,776.55/x
  3. Step 3: Cross multiply
    519,782.90x = 779,218.80 × 249,776.55
  4. Step 4: Simplify right side
    519,782.90x = 194,630,583,559.14
  5. Step 5: Solve for x
    x = 194,630,583,559.14/519,782.90
  6. Step 6: Final answer
    x = 374,445.92

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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.