Home / 918,987.93-1,378,668.73-319,995.80

Finding the Fourth Proportional to 918,987.93, 1,378,668.73 and 319,995.80

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Solution

The fourth proportional to 918,987.93, 1,378,668.73 and 319,995.80 is: 480,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,987.93 : 1,378,668.73 = 319,995.80 : x
  2. Step 2: Convert to fraction form
    918,987.93/1,378,668.73 = 319,995.80/x
  3. Step 3: Cross multiply
    918,987.93x = 1,378,668.73 × 319,995.80
  4. Step 4: Simplify right side
    918,987.93x = 441,168,203,191.33
  5. Step 5: Solve for x
    x = 441,168,203,191.33/918,987.93
  6. Step 6: Final answer
    x = 480,058.76

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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.