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Finding the Fourth Proportional to 553,616.40, 828,456.30 and 384,342.60

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Solution

The fourth proportional to 553,616.40, 828,456.30 and 384,342.60 is: 575,147.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,616.40 : 828,456.30 = 384,342.60 : x
  2. Step 2: Convert to fraction form
    553,616.40/828,456.30 = 384,342.60/x
  3. Step 3: Cross multiply
    553,616.40x = 828,456.30 × 384,342.60
  4. Step 4: Simplify right side
    553,616.40x = 318,411,048,328.38
  5. Step 5: Solve for x
    x = 318,411,048,328.38/553,616.40
  6. Step 6: Final answer
    x = 575,147.43

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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.