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Finding the Fourth Proportional to 640,704.40, 884,356.56 and 423,071.96

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Solution

The fourth proportional to 640,704.40, 884,356.56 and 423,071.96 is: 583,961.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,704.40 : 884,356.56 = 423,071.96 : x
  2. Step 2: Convert to fraction form
    640,704.40/884,356.56 = 423,071.96/x
  3. Step 3: Cross multiply
    640,704.40x = 884,356.56 × 423,071.96
  4. Step 4: Simplify right side
    640,704.40x = 374,146,463,178.06
  5. Step 5: Solve for x
    x = 374,146,463,178.06/640,704.40
  6. Step 6: Final answer
    x = 583,961.13

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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.