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Finding the Fourth Proportional to 555,575.06, 766,690.90 and 310,559.76

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Solution

The fourth proportional to 555,575.06, 766,690.90 and 310,559.76 is: 428,570.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,575.06 : 766,690.90 = 310,559.76 : x
  2. Step 2: Convert to fraction form
    555,575.06/766,690.90 = 310,559.76/x
  3. Step 3: Cross multiply
    555,575.06x = 766,690.90 × 310,559.76
  4. Step 4: Simplify right side
    555,575.06x = 238,103,341,898.18
  5. Step 5: Solve for x
    x = 238,103,341,898.18/555,575.06
  6. Step 6: Final answer
    x = 428,570.97

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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.