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Finding the Fourth Proportional to 500,818.05, 691,368.30 and 285,916.60

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Solution

The fourth proportional to 500,818.05, 691,368.30 and 285,916.60 is: 394,701.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,818.05 : 691,368.30 = 285,916.60 : x
  2. Step 2: Convert to fraction form
    500,818.05/691,368.30 = 285,916.60/x
  3. Step 3: Cross multiply
    500,818.05x = 691,368.30 × 285,916.60
  4. Step 4: Simplify right side
    500,818.05x = 197,673,674,547.99
  5. Step 5: Solve for x
    x = 197,673,674,547.99/500,818.05
  6. Step 6: Final answer
    x = 394,701.58

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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.