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Finding the Fourth Proportional to 472,088.80, 707,672.40 and 422,322.40

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Solution

The fourth proportional to 472,088.80, 707,672.40 and 422,322.40 is: 633,071.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,088.80 : 707,672.40 = 422,322.40 : x
  2. Step 2: Convert to fraction form
    472,088.80/707,672.40 = 422,322.40/x
  3. Step 3: Cross multiply
    472,088.80x = 707,672.40 × 422,322.40
  4. Step 4: Simplify right side
    472,088.80x = 298,865,906,381.76
  5. Step 5: Solve for x
    x = 298,865,906,381.76/472,088.80
  6. Step 6: Final answer
    x = 633,071.38

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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.