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Finding the Fourth Proportional to 579,702.51, 799,988.75 and 321,618.59

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Solution

The fourth proportional to 579,702.51, 799,988.75 and 321,618.59 is: 443,833.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,702.51 : 799,988.75 = 321,618.59 : x
  2. Step 2: Convert to fraction form
    579,702.51/799,988.75 = 321,618.59/x
  3. Step 3: Cross multiply
    579,702.51x = 799,988.75 × 321,618.59
  4. Step 4: Simplify right side
    579,702.51x = 257,291,248,182.83
  5. Step 5: Solve for x
    x = 257,291,248,182.83/579,702.51
  6. Step 6: Final answer
    x = 443,833.25

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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.