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Finding the Fourth Proportional to 657,986.08, 987,279.60 and 358,016.80

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Solution

The fourth proportional to 657,986.08, 987,279.60 and 358,016.80 is: 537,188.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,986.08 : 987,279.60 = 358,016.80 : x
  2. Step 2: Convert to fraction form
    657,986.08/987,279.60 = 358,016.80/x
  3. Step 3: Cross multiply
    657,986.08x = 987,279.60 × 358,016.80
  4. Step 4: Simplify right side
    657,986.08x = 353,462,683,097.28
  5. Step 5: Solve for x
    x = 353,462,683,097.28/657,986.08
  6. Step 6: Final answer
    x = 537,188.69

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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.