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Finding the Fourth Proportional to 645,570.72, 890,874.48 and 359,084.64

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Solution

The fourth proportional to 645,570.72, 890,874.48 and 359,084.64 is: 495,529.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,570.72 : 890,874.48 = 359,084.64 : x
  2. Step 2: Convert to fraction form
    645,570.72/890,874.48 = 359,084.64/x
  3. Step 3: Cross multiply
    645,570.72x = 890,874.48 × 359,084.64
  4. Step 4: Simplify right side
    645,570.72x = 319,899,341,935.99
  5. Step 5: Solve for x
    x = 319,899,341,935.99/645,570.72
  6. Step 6: Final answer
    x = 495,529.51

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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.