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Finding the Fourth Proportional to 256,348.48, 384,566.48 and 78,851.56

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Solution

The fourth proportional to 256,348.48, 384,566.48 and 78,851.56 is: 118,290.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,348.48 : 384,566.48 = 78,851.56 : x
  2. Step 2: Convert to fraction form
    256,348.48/384,566.48 = 78,851.56/x
  3. Step 3: Cross multiply
    256,348.48x = 384,566.48 × 78,851.56
  4. Step 4: Simplify right side
    256,348.48x = 30,323,666,871.71
  5. Step 5: Solve for x
    x = 30,323,666,871.71/256,348.48
  6. Step 6: Final answer
    x = 118,290.80

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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.