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Finding the Fourth Proportional to 640,691.82, 884,008.08 and 382,518.63

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Solution

The fourth proportional to 640,691.82, 884,008.08 and 382,518.63 is: 527,788.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,691.82 : 884,008.08 = 382,518.63 : x
  2. Step 2: Convert to fraction form
    640,691.82/884,008.08 = 382,518.63/x
  3. Step 3: Cross multiply
    640,691.82x = 884,008.08 × 382,518.63
  4. Step 4: Simplify right side
    640,691.82x = 338,149,559,670.53
  5. Step 5: Solve for x
    x = 338,149,559,670.53/640,691.82
  6. Step 6: Final answer
    x = 527,788.16

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1.5x scale

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.