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Finding the Fourth Proportional to 622,196.48, 858,695.64 and 380,639.90

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Solution

The fourth proportional to 622,196.48, 858,695.64 and 380,639.90 is: 525,322.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,196.48 : 858,695.64 = 380,639.90 : x
  2. Step 2: Convert to fraction form
    622,196.48/858,695.64 = 380,639.90/x
  3. Step 3: Cross multiply
    622,196.48x = 858,695.64 × 380,639.90
  4. Step 4: Simplify right side
    622,196.48x = 326,853,822,540.04
  5. Step 5: Solve for x
    x = 326,853,822,540.04/622,196.48
  6. Step 6: Final answer
    x = 525,322.52

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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.