Home / 738,320.91-1,018,883.54-398,789.16

Finding the Fourth Proportional to 738,320.91, 1,018,883.54 and 398,789.16

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Solution

The fourth proportional to 738,320.91, 1,018,883.54 and 398,789.16 is: 550,329.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,320.91 : 1,018,883.54 = 398,789.16 : x
  2. Step 2: Convert to fraction form
    738,320.91/1,018,883.54 = 398,789.16/x
  3. Step 3: Cross multiply
    738,320.91x = 1,018,883.54 × 398,789.16
  4. Step 4: Simplify right side
    738,320.91x = 406,319,708,230.59
  5. Step 5: Solve for x
    x = 406,319,708,230.59/738,320.91
  6. Step 6: Final answer
    x = 550,329.41

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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.