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Finding the Fourth Proportional to 553,849.47, 764,313.33 and 321,321.55

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Solution

The fourth proportional to 553,849.47, 764,313.33 and 321,321.55 is: 443,424.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,849.47 : 764,313.33 = 321,321.55 : x
  2. Step 2: Convert to fraction form
    553,849.47/764,313.33 = 321,321.55/x
  3. Step 3: Cross multiply
    553,849.47x = 764,313.33 × 321,321.55
  4. Step 4: Simplify right side
    553,849.47x = 245,590,343,881.26
  5. Step 5: Solve for x
    x = 245,590,343,881.26/553,849.47
  6. Step 6: Final answer
    x = 443,424.36

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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.