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Finding the Fourth Proportional to 554,237.42, 764,782.64 and 312,505.60

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Solution

The fourth proportional to 554,237.42, 764,782.64 and 312,505.60 is: 431,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,237.42 : 764,782.64 = 312,505.60 : x
  2. Step 2: Convert to fraction form
    554,237.42/764,782.64 = 312,505.60/x
  3. Step 3: Cross multiply
    554,237.42x = 764,782.64 × 312,505.60
  4. Step 4: Simplify right side
    554,237.42x = 238,998,857,782.78
  5. Step 5: Solve for x
    x = 238,998,857,782.78/554,237.42
  6. Step 6: Final answer
    x = 431,221.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.