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Finding the Fourth Proportional to 456,643.80, 685,008.90 and 124,219.80

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Solution

The fourth proportional to 456,643.80, 685,008.90 and 124,219.80 is: 186,341.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,643.80 : 685,008.90 = 124,219.80 : x
  2. Step 2: Convert to fraction form
    456,643.80/685,008.90 = 124,219.80/x
  3. Step 3: Cross multiply
    456,643.80x = 685,008.90 × 124,219.80
  4. Step 4: Simplify right side
    456,643.80x = 85,091,668,556.22
  5. Step 5: Solve for x
    x = 85,091,668,556.22/456,643.80
  6. Step 6: Final answer
    x = 186,341.45

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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.