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Finding the Fourth Proportional to 663,284.78, 915,365.44 and 372,987.70

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Solution

The fourth proportional to 663,284.78, 915,365.44 and 372,987.70 is: 514,741.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,284.78 : 915,365.44 = 372,987.70 : x
  2. Step 2: Convert to fraction form
    663,284.78/915,365.44 = 372,987.70/x
  3. Step 3: Cross multiply
    663,284.78x = 915,365.44 × 372,987.70
  4. Step 4: Simplify right side
    663,284.78x = 341,420,050,125.09
  5. Step 5: Solve for x
    x = 341,420,050,125.09/663,284.78
  6. Step 6: Final answer
    x = 514,741.27

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1.5x scale

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.