Home / 989,321.49-1,482,979.25-390,704.36

Finding the Fourth Proportional to 989,321.49, 1,482,979.25 and 390,704.36

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Solution

The fourth proportional to 989,321.49, 1,482,979.25 and 390,704.36 is: 585,660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,321.49 : 1,482,979.25 = 390,704.36 : x
  2. Step 2: Convert to fraction form
    989,321.49/1,482,979.25 = 390,704.36/x
  3. Step 3: Cross multiply
    989,321.49x = 1,482,979.25 × 390,704.36
  4. Step 4: Simplify right side
    989,321.49x = 579,406,452,326.40
  5. Step 5: Solve for x
    x = 579,406,452,326.40/989,321.49
  6. Step 6: Final answer
    x = 585,660.43

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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.