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Finding the Fourth Proportional to 621,242.40, 931,402.80 and 265,965.60

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Solution

The fourth proportional to 621,242.40, 931,402.80 and 265,965.60 is: 398,751.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,242.40 : 931,402.80 = 265,965.60 : x
  2. Step 2: Convert to fraction form
    621,242.40/931,402.80 = 265,965.60/x
  3. Step 3: Cross multiply
    621,242.40x = 931,402.80 × 265,965.60
  4. Step 4: Simplify right side
    621,242.40x = 247,721,104,543.68
  5. Step 5: Solve for x
    x = 247,721,104,543.68/621,242.40
  6. Step 6: Final answer
    x = 398,751.12

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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.