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Finding the Fourth Proportional to 615,317.69, 849,133.49 and 357,218.59

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Solution

The fourth proportional to 615,317.69, 849,133.49 and 357,218.59 is: 492,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,317.69 : 849,133.49 = 357,218.59 : x
  2. Step 2: Convert to fraction form
    615,317.69/849,133.49 = 357,218.59/x
  3. Step 3: Cross multiply
    615,317.69x = 849,133.49 × 357,218.59
  4. Step 4: Simplify right side
    615,317.69x = 303,326,268,019.58
  5. Step 5: Solve for x
    x = 303,326,268,019.58/615,317.69
  6. Step 6: Final answer
    x = 492,958.80

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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.