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Finding the Fourth Proportional to 487,192.56, 671,992.13 and 317,656.32

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Solution

The fourth proportional to 487,192.56, 671,992.13 and 317,656.32 is: 438,148.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,192.56 : 671,992.13 = 317,656.32 : x
  2. Step 2: Convert to fraction form
    487,192.56/671,992.13 = 317,656.32/x
  3. Step 3: Cross multiply
    487,192.56x = 671,992.13 × 317,656.32
  4. Step 4: Simplify right side
    487,192.56x = 213,462,545,496.48
  5. Step 5: Solve for x
    x = 213,462,545,496.48/487,192.56
  6. Step 6: Final answer
    x = 438,148.20

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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.