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Finding the Fourth Proportional to 458,615.40, 686,540.70 and 403,319.40

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Solution

The fourth proportional to 458,615.40, 686,540.70 and 403,319.40 is: 603,763.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,615.40 : 686,540.70 = 403,319.40 : x
  2. Step 2: Convert to fraction form
    458,615.40/686,540.70 = 403,319.40/x
  3. Step 3: Cross multiply
    458,615.40x = 686,540.70 × 403,319.40
  4. Step 4: Simplify right side
    458,615.40x = 276,895,183,199.58
  5. Step 5: Solve for x
    x = 276,895,183,199.58/458,615.40
  6. Step 6: Final answer
    x = 603,763.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.