Home / 450,927.39-621,980.42-289,986.06

Finding the Fourth Proportional to 450,927.39, 621,980.42 and 289,986.06

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Solution

The fourth proportional to 450,927.39, 621,980.42 and 289,986.06 is: 399,988.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,927.39 : 621,980.42 = 289,986.06 : x
  2. Step 2: Convert to fraction form
    450,927.39/621,980.42 = 289,986.06/x
  3. Step 3: Cross multiply
    450,927.39x = 621,980.42 × 289,986.06
  4. Step 4: Simplify right side
    450,927.39x = 180,365,649,943.02
  5. Step 5: Solve for x
    x = 180,365,649,943.02/450,927.39
  6. Step 6: Final answer
    x = 399,988.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.