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Finding the Fourth Proportional to 582,643.79, 804,070.14 and 321,009.72

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Solution

The fourth proportional to 582,643.79, 804,070.14 and 321,009.72 is: 443,005.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    582,643.79 : 804,070.14 = 321,009.72 : x
  2. Step 2: Convert to fraction form
    582,643.79/804,070.14 = 321,009.72/x
  3. Step 3: Cross multiply
    582,643.79x = 804,070.14 × 321,009.72
  4. Step 4: Simplify right side
    582,643.79x = 258,114,328,896.71
  5. Step 5: Solve for x
    x = 258,114,328,896.71/582,643.79
  6. Step 6: Final answer
    x = 443,005.38

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Double scale
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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.