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Finding the Fourth Proportional to 368,897.79, 553,404.87 and 129,078.66

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Solution

The fourth proportional to 368,897.79, 553,404.87 and 129,078.66 is: 193,638.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,897.79 : 553,404.87 = 129,078.66 : x
  2. Step 2: Convert to fraction form
    368,897.79/553,404.87 = 129,078.66/x
  3. Step 3: Cross multiply
    368,897.79x = 553,404.87 × 129,078.66
  4. Step 4: Simplify right side
    368,897.79x = 71,432,759,057.07
  5. Step 5: Solve for x
    x = 71,432,759,057.07/368,897.79
  6. Step 6: Final answer
    x = 193,638.35

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1.5x scale

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.