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Finding the Fourth Proportional to 571,665.60, 788,900.64 and 317,040.32

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Solution

The fourth proportional to 571,665.60, 788,900.64 and 317,040.32 is: 437,516.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,665.60 : 788,900.64 = 317,040.32 : x
  2. Step 2: Convert to fraction form
    571,665.60/788,900.64 = 317,040.32/x
  3. Step 3: Cross multiply
    571,665.60x = 788,900.64 × 317,040.32
  4. Step 4: Simplify right side
    571,665.60x = 250,113,311,353.81
  5. Step 5: Solve for x
    x = 250,113,311,353.81/571,665.60
  6. Step 6: Final answer
    x = 437,516.81

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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.