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Finding the Fourth Proportional to 663,312.80, 994,969.20 and 424,164.35

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Solution

The fourth proportional to 663,312.80, 994,969.20 and 424,164.35 is: 636,246.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,312.80 : 994,969.20 = 424,164.35 : x
  2. Step 2: Convert to fraction form
    663,312.80/994,969.20 = 424,164.35/x
  3. Step 3: Cross multiply
    663,312.80x = 994,969.20 × 424,164.35
  4. Step 4: Simplify right side
    663,312.80x = 422,030,463,988.02
  5. Step 5: Solve for x
    x = 422,030,463,988.02/663,312.80
  6. Step 6: Final answer
    x = 636,246.53

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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.