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Finding the Fourth Proportional to 661,237.39, 912,508.20 and 359,431.39

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Solution

The fourth proportional to 661,237.39, 912,508.20 and 359,431.39 is: 496,015.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,237.39 : 912,508.20 = 359,431.39 : x
  2. Step 2: Convert to fraction form
    661,237.39/912,508.20 = 359,431.39/x
  3. Step 3: Cross multiply
    661,237.39x = 912,508.20 × 359,431.39
  4. Step 4: Simplify right side
    661,237.39x = 327,984,090,712.40
  5. Step 5: Solve for x
    x = 327,984,090,712.40/661,237.39
  6. Step 6: Final answer
    x = 496,015.65

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1.5x scale

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.