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Finding the Fourth Proportional to 400,038.12, 551,103.48 and 278,959.32

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Solution

The fourth proportional to 400,038.12, 551,103.48 and 278,959.32 is: 384,302.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,038.12 : 551,103.48 = 278,959.32 : x
  2. Step 2: Convert to fraction form
    400,038.12/551,103.48 = 278,959.32/x
  3. Step 3: Cross multiply
    400,038.12x = 551,103.48 × 278,959.32
  4. Step 4: Simplify right side
    400,038.12x = 153,735,452,030.43
  5. Step 5: Solve for x
    x = 153,735,452,030.43/400,038.12
  6. Step 6: Final answer
    x = 384,302.01

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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.