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Finding the Fourth Proportional to 509,845.80, 764,987.40 and 260,527.80

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Solution

The fourth proportional to 509,845.80, 764,987.40 and 260,527.80 is: 390,903.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,845.80 : 764,987.40 = 260,527.80 : x
  2. Step 2: Convert to fraction form
    509,845.80/764,987.40 = 260,527.80/x
  3. Step 3: Cross multiply
    509,845.80x = 764,987.40 × 260,527.80
  4. Step 4: Simplify right side
    509,845.80x = 199,300,484,349.72
  5. Step 5: Solve for x
    x = 199,300,484,349.72/509,845.80
  6. Step 6: Final answer
    x = 390,903.45

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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.