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Finding the Fourth Proportional to 423,053.40, 635,616.90 and 318,077.40

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Solution

The fourth proportional to 423,053.40, 635,616.90 and 318,077.40 is: 477,895.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,053.40 : 635,616.90 = 318,077.40 : x
  2. Step 2: Convert to fraction form
    423,053.40/635,616.90 = 318,077.40/x
  3. Step 3: Cross multiply
    423,053.40x = 635,616.90 × 318,077.40
  4. Step 4: Simplify right side
    423,053.40x = 202,175,370,948.06
  5. Step 5: Solve for x
    x = 202,175,370,948.06/423,053.40
  6. Step 6: Final answer
    x = 477,895.63

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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.