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Finding the Fourth Proportional to 318,806.48, 478,209.72 and 97,188.56

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Solution

The fourth proportional to 318,806.48, 478,209.72 and 97,188.56 is: 145,782.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,806.48 : 478,209.72 = 97,188.56 : x
  2. Step 2: Convert to fraction form
    318,806.48/478,209.72 = 97,188.56/x
  3. Step 3: Cross multiply
    318,806.48x = 478,209.72 × 97,188.56
  4. Step 4: Simplify right side
    318,806.48x = 46,476,514,064.80
  5. Step 5: Solve for x
    x = 46,476,514,064.80/318,806.48
  6. Step 6: Final answer
    x = 145,782.84

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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.