Home / 917,009.80-1,375,514.70-285,918.60

Finding the Fourth Proportional to 917,009.80, 1,375,514.70 and 285,918.60

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Solution

The fourth proportional to 917,009.80, 1,375,514.70 and 285,918.60 is: 428,877.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,009.80 : 1,375,514.70 = 285,918.60 : x
  2. Step 2: Convert to fraction form
    917,009.80/1,375,514.70 = 285,918.60/x
  3. Step 3: Cross multiply
    917,009.80x = 1,375,514.70 × 285,918.60
  4. Step 4: Simplify right side
    917,009.80x = 393,285,237,303.42
  5. Step 5: Solve for x
    x = 393,285,237,303.42/917,009.80
  6. Step 6: Final answer
    x = 428,877.90

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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.