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Finding the Fourth Proportional to 353,055.84, 529,417.32 and 128,257.76

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Solution

The fourth proportional to 353,055.84, 529,417.32 and 128,257.76 is: 192,326.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,055.84 : 529,417.32 = 128,257.76 : x
  2. Step 2: Convert to fraction form
    353,055.84/529,417.32 = 128,257.76/x
  3. Step 3: Cross multiply
    353,055.84x = 529,417.32 × 128,257.76
  4. Step 4: Simplify right side
    353,055.84x = 67,901,879,568.40
  5. Step 5: Solve for x
    x = 67,901,879,568.40/353,055.84
  6. Step 6: Final answer
    x = 192,326.18

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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.