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Finding the Fourth Proportional to 639,064.16, 885,636.62 and 630,044

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Solution

The fourth proportional to 639,064.16, 885,636.62 and 630,044 is: 873,136.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,064.16 : 885,636.62 = 630,044 : x
  2. Step 2: Convert to fraction form
    639,064.16/885,636.62 = 630,044/x
  3. Step 3: Cross multiply
    639,064.16x = 885,636.62 × 630,044
  4. Step 4: Simplify right side
    639,064.16x = 557,990,038,611.28
  5. Step 5: Solve for x
    x = 557,990,038,611.28/639,064.16
  6. Step 6: Final answer
    x = 873,136.18

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.