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Finding the Fourth Proportional to 259,278.80, 388,918.20 and 243,532.40

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Solution

The fourth proportional to 259,278.80, 388,918.20 and 243,532.40 is: 365,298.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,278.80 : 388,918.20 = 243,532.40 : x
  2. Step 2: Convert to fraction form
    259,278.80/388,918.20 = 243,532.40/x
  3. Step 3: Cross multiply
    259,278.80x = 388,918.20 × 243,532.40
  4. Step 4: Simplify right side
    259,278.80x = 94,714,182,649.68
  5. Step 5: Solve for x
    x = 94,714,182,649.68/259,278.80
  6. Step 6: Final answer
    x = 365,298.60

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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.