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Finding the Fourth Proportional to 353,406.59, 487,664.67 and 210,138.95

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Solution

The fourth proportional to 353,406.59, 487,664.67 and 210,138.95 is: 289,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,406.59 : 487,664.67 = 210,138.95 : x
  2. Step 2: Convert to fraction form
    353,406.59/487,664.67 = 210,138.95/x
  3. Step 3: Cross multiply
    353,406.59x = 487,664.67 × 210,138.95
  4. Step 4: Simplify right side
    353,406.59x = 102,477,342,925.06
  5. Step 5: Solve for x
    x = 102,477,342,925.06/353,406.59
  6. Step 6: Final answer
    x = 289,970.10

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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.