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Finding the Fourth Proportional to 520,061.80, 780,092.70 and 319,732.60

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Solution

The fourth proportional to 520,061.80, 780,092.70 and 319,732.60 is: 479,598.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,061.80 : 780,092.70 = 319,732.60 : x
  2. Step 2: Convert to fraction form
    520,061.80/780,092.70 = 319,732.60/x
  3. Step 3: Cross multiply
    520,061.80x = 780,092.70 × 319,732.60
  4. Step 4: Simplify right side
    520,061.80x = 249,421,067,212.02
  5. Step 5: Solve for x
    x = 249,421,067,212.02/520,061.80
  6. Step 6: Final answer
    x = 479,598.90

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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.