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Finding the Fourth Proportional to 631,465.32, 947,796.81 and 390,851.38

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Solution

The fourth proportional to 631,465.32, 947,796.81 and 390,851.38 is: 586,647.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,465.32 : 947,796.81 = 390,851.38 : x
  2. Step 2: Convert to fraction form
    631,465.32/947,796.81 = 390,851.38/x
  3. Step 3: Cross multiply
    631,465.32x = 947,796.81 × 390,851.38
  4. Step 4: Simplify right side
    631,465.32x = 370,447,695,731.37
  5. Step 5: Solve for x
    x = 370,447,695,731.37/631,465.32
  6. Step 6: Final answer
    x = 586,647.73

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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.