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Finding the Fourth Proportional to 645,988, 891,454.73 and 359,508.01

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Solution

The fourth proportional to 645,988, 891,454.73 and 359,508.01 is: 496,116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,988 : 891,454.73 = 359,508.01 : x
  2. Step 2: Convert to fraction form
    645,988/891,454.73 = 359,508.01/x
  3. Step 3: Cross multiply
    645,988x = 891,454.73 × 359,508.01
  4. Step 4: Simplify right side
    645,988x = 320,485,116,886.16
  5. Step 5: Solve for x
    x = 320,485,116,886.16/645,988
  6. Step 6: Final answer
    x = 496,116.21

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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.