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Finding the Fourth Proportional to 554,239.31, 764,785.23 and 312,507.47

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Solution

The fourth proportional to 554,239.31, 764,785.23 and 312,507.47 is: 431,223.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,239.31 : 764,785.23 = 312,507.47 : x
  2. Step 2: Convert to fraction form
    554,239.31/764,785.23 = 312,507.47/x
  3. Step 3: Cross multiply
    554,239.31x = 764,785.23 × 312,507.47
  4. Step 4: Simplify right side
    554,239.31x = 239,001,093,496.74
  5. Step 5: Solve for x
    x = 239,001,093,496.74/554,239.31
  6. Step 6: Final answer
    x = 431,223.65

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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.