Home / 499,316.22-689,417.19-308,591.10

Finding the Fourth Proportional to 499,316.22, 689,417.19 and 308,591.10

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Solution

The fourth proportional to 499,316.22, 689,417.19 and 308,591.10 is: 426,078.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,316.22 : 689,417.19 = 308,591.10 : x
  2. Step 2: Convert to fraction form
    499,316.22/689,417.19 = 308,591.10/x
  3. Step 3: Cross multiply
    499,316.22x = 689,417.19 × 308,591.10
  4. Step 4: Simplify right side
    499,316.22x = 212,748,009,021.01
  5. Step 5: Solve for x
    x = 212,748,009,021.01/499,316.22
  6. Step 6: Final answer
    x = 426,078.71

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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.