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Finding the Fourth Proportional to 493,940.16, 681,386.88 and 312,346.08

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Solution

The fourth proportional to 493,940.16, 681,386.88 and 312,346.08 is: 430,879.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,940.16 : 681,386.88 = 312,346.08 : x
  2. Step 2: Convert to fraction form
    493,940.16/681,386.88 = 312,346.08/x
  3. Step 3: Cross multiply
    493,940.16x = 681,386.88 × 312,346.08
  4. Step 4: Simplify right side
    493,940.16x = 212,828,520,931.43
  5. Step 5: Solve for x
    x = 212,828,520,931.43/493,940.16
  6. Step 6: Final answer
    x = 430,879.16

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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.