Home / 738,390.25-1,018,979.09-398,858.50

Finding the Fourth Proportional to 738,390.25, 1,018,979.09 and 398,858.50

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Solution

The fourth proportional to 738,390.25, 1,018,979.09 and 398,858.50 is: 550,425.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,390.25 : 1,018,979.09 = 398,858.50 : x
  2. Step 2: Convert to fraction form
    738,390.25/1,018,979.09 = 398,858.50/x
  3. Step 3: Cross multiply
    738,390.25x = 1,018,979.09 × 398,858.50
  4. Step 4: Simplify right side
    738,390.25x = 406,428,471,368.77
  5. Step 5: Solve for x
    x = 406,428,471,368.77/738,390.25
  6. Step 6: Final answer
    x = 550,425.02

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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.