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Finding the Fourth Proportional to 645,695.88, 891,072.28 and 359,242.64

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Solution

The fourth proportional to 645,695.88, 891,072.28 and 359,242.64 is: 495,761.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,695.88 : 891,072.28 = 359,242.64 : x
  2. Step 2: Convert to fraction form
    645,695.88/891,072.28 = 359,242.64/x
  3. Step 3: Cross multiply
    645,695.88x = 891,072.28 × 359,242.64
  4. Step 4: Simplify right side
    645,695.88x = 320,111,158,298.02
  5. Step 5: Solve for x
    x = 320,111,158,298.02/645,695.88
  6. Step 6: Final answer
    x = 495,761.50

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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.