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Finding the Fourth Proportional to 401,806.60, 602,709.98 and 313,126.52

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Solution

The fourth proportional to 401,806.60, 602,709.98 and 313,126.52 is: 469,689.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,806.60 : 602,709.98 = 313,126.52 : x
  2. Step 2: Convert to fraction form
    401,806.60/602,709.98 = 313,126.52/x
  3. Step 3: Cross multiply
    401,806.60x = 602,709.98 × 313,126.52
  4. Step 4: Simplify right side
    401,806.60x = 188,724,478,606.67
  5. Step 5: Solve for x
    x = 188,724,478,606.67/401,806.60
  6. Step 6: Final answer
    x = 469,689.84

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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.