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Finding the Fourth Proportional to 508,745.60, 702,071.64 and 317,869.70

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Solution

The fourth proportional to 508,745.60, 702,071.64 and 317,869.70 is: 438,661.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,745.60 : 702,071.64 = 317,869.70 : x
  2. Step 2: Convert to fraction form
    508,745.60/702,071.64 = 317,869.70/x
  3. Step 3: Cross multiply
    508,745.60x = 702,071.64 × 317,869.70
  4. Step 4: Simplify right side
    508,745.60x = 223,167,301,585.31
  5. Step 5: Solve for x
    x = 223,167,301,585.31/508,745.60
  6. Step 6: Final answer
    x = 438,661.88

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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.