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Finding the Fourth Proportional to 903,906.72, 1,355,328.48 and 342,980.64

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Solution

The fourth proportional to 903,906.72, 1,355,328.48 and 342,980.64 is: 514,269.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,906.72 : 1,355,328.48 = 342,980.64 : x
  2. Step 2: Convert to fraction form
    903,906.72/1,355,328.48 = 342,980.64/x
  3. Step 3: Cross multiply
    903,906.72x = 1,355,328.48 × 342,980.64
  4. Step 4: Simplify right side
    903,906.72x = 464,851,429,480.63
  5. Step 5: Solve for x
    x = 464,851,429,480.63/903,906.72
  6. Step 6: Final answer
    x = 514,269.25

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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.