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Finding the Fourth Proportional to 520,044.80, 780,067.20 and 319,715.60

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Solution

The fourth proportional to 520,044.80, 780,067.20 and 319,715.60 is: 479,573.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,044.80 : 780,067.20 = 319,715.60 : x
  2. Step 2: Convert to fraction form
    520,044.80/780,067.20 = 319,715.60/x
  3. Step 3: Cross multiply
    520,044.80x = 780,067.20 × 319,715.60
  4. Step 4: Simplify right side
    520,044.80x = 249,399,652,888.32
  5. Step 5: Solve for x
    x = 249,399,652,888.32/520,044.80
  6. Step 6: Final answer
    x = 479,573.40

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1.5x scale

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.