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Finding the Fourth Proportional to 306,038.80, 428,897.19 and 306,038.80

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Solution

The fourth proportional to 306,038.80, 428,897.19 and 306,038.80 is: 428,897.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,038.80 : 428,897.19 = 306,038.80 : x
  2. Step 2: Convert to fraction form
    306,038.80/428,897.19 = 306,038.80/x
  3. Step 3: Cross multiply
    306,038.80x = 428,897.19 × 306,038.80
  4. Step 4: Simplify right side
    306,038.80x = 131,259,181,350.97
  5. Step 5: Solve for x
    x = 131,259,181,350.97/306,038.80
  6. Step 6: Final answer
    x = 428,897.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.