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Finding the Fourth Proportional to 579,699.64, 799,984.76 and 321,615.72

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Solution

The fourth proportional to 579,699.64, 799,984.76 and 321,615.72 is: 443,829.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,699.64 : 799,984.76 = 321,615.72 : x
  2. Step 2: Convert to fraction form
    579,699.64/799,984.76 = 321,615.72/x
  3. Step 3: Cross multiply
    579,699.64x = 799,984.76 × 321,615.72
  4. Step 4: Simplify right side
    579,699.64x = 257,287,674,576.43
  5. Step 5: Solve for x
    x = 257,287,674,576.43/579,699.64
  6. Step 6: Final answer
    x = 443,829.28

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Double scale
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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.