Home / 426,815,999.80-640,223,999.70-422,281,036.60

Finding the Fourth Proportional to 426,815,999.80, 640,223,999.70 and 422,281,036.60

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Solution

The fourth proportional to 426,815,999.80, 640,223,999.70 and 422,281,036.60 is: 633,421,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,815,999.80 : 640,223,999.70 = 422,281,036.60 : x
  2. Step 2: Convert to fraction form
    426,815,999.80/640,223,999.70 = 422,281,036.60/x
  3. Step 3: Cross multiply
    426,815,999.80x = 640,223,999.70 × 422,281,036.60
  4. Step 4: Simplify right side
    426,815,999.80x = 270,354,454,249,514,112
  5. Step 5: Solve for x
    x = 270,354,454,249,514,112/426,815,999.80
  6. Step 6: Final answer
    x = 633,421,554.90

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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.