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Finding the Fourth Proportional to 458,020.40, 687,030.60 and 316,302.80

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Solution

The fourth proportional to 458,020.40, 687,030.60 and 316,302.80 is: 474,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,020.40 : 687,030.60 = 316,302.80 : x
  2. Step 2: Convert to fraction form
    458,020.40/687,030.60 = 316,302.80/x
  3. Step 3: Cross multiply
    458,020.40x = 687,030.60 × 316,302.80
  4. Step 4: Simplify right side
    458,020.40x = 217,309,702,465.68
  5. Step 5: Solve for x
    x = 217,309,702,465.68/458,020.40
  6. Step 6: Final answer
    x = 474,454.20

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