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Finding the Fourth Proportional to 338,486.94, 507,730.95 and 85,767.48

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Solution

The fourth proportional to 338,486.94, 507,730.95 and 85,767.48 is: 128,651.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,486.94 : 507,730.95 = 85,767.48 : x
  2. Step 2: Convert to fraction form
    338,486.94/507,730.95 = 85,767.48/x
  3. Step 3: Cross multiply
    338,486.94x = 507,730.95 × 85,767.48
  4. Step 4: Simplify right side
    338,486.94x = 43,546,804,099.51
  5. Step 5: Solve for x
    x = 43,546,804,099.51/338,486.94
  6. Step 6: Final answer
    x = 128,651.36

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1.5x scale

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.