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Finding the Fourth Proportional to 318,883.25, 478,368.77 and 141,386.33

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Solution

The fourth proportional to 318,883.25, 478,368.77 and 141,386.33 is: 212,098.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,883.25 : 478,368.77 = 141,386.33 : x
  2. Step 2: Convert to fraction form
    318,883.25/478,368.77 = 141,386.33/x
  3. Step 3: Cross multiply
    318,883.25x = 478,368.77 × 141,386.33
  4. Step 4: Simplify right side
    318,883.25x = 67,634,801,678.14
  5. Step 5: Solve for x
    x = 67,634,801,678.14/318,883.25
  6. Step 6: Final answer
    x = 212,098.95

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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.