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Finding the Fourth Proportional to 508,747.60, 702,074.40 and 317,871.70

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Solution

The fourth proportional to 508,747.60, 702,074.40 and 317,871.70 is: 438,664.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,747.60 : 702,074.40 = 317,871.70 : x
  2. Step 2: Convert to fraction form
    508,747.60/702,074.40 = 317,871.70/x
  3. Step 3: Cross multiply
    508,747.60x = 702,074.40 × 317,871.70
  4. Step 4: Simplify right side
    508,747.60x = 223,169,583,054.48
  5. Step 5: Solve for x
    x = 223,169,583,054.48/508,747.60
  6. Step 6: Final answer
    x = 438,664.64

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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.