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Finding the Fourth Proportional to 258,970.40, 388,455.60 and 176,026.40

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Solution

The fourth proportional to 258,970.40, 388,455.60 and 176,026.40 is: 264,039.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,970.40 : 388,455.60 = 176,026.40 : x
  2. Step 2: Convert to fraction form
    258,970.40/388,455.60 = 176,026.40/x
  3. Step 3: Cross multiply
    258,970.40x = 388,455.60 × 176,026.40
  4. Step 4: Simplify right side
    258,970.40x = 68,378,440,827.84
  5. Step 5: Solve for x
    x = 68,378,440,827.84/258,970.40
  6. Step 6: Final answer
    x = 264,039.60

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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.