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Finding the Fourth Proportional to 645,488.64, 890,827.92 and 359,062.56

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Solution

The fourth proportional to 645,488.64, 890,827.92 and 359,062.56 is: 495,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,488.64 : 890,827.92 = 359,062.56 : x
  2. Step 2: Convert to fraction form
    645,488.64/890,827.92 = 359,062.56/x
  3. Step 3: Cross multiply
    645,488.64x = 890,827.92 × 359,062.56
  4. Step 4: Simplify right side
    645,488.64x = 319,862,953,474.68
  5. Step 5: Solve for x
    x = 319,862,953,474.68/645,488.64
  6. Step 6: Final answer
    x = 495,536.15

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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.