Home / 427,318,386.30-640,977,579.45-422,783,423.10

Finding the Fourth Proportional to 427,318,386.30, 640,977,579.45 and 422,783,423.10

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Solution

The fourth proportional to 427,318,386.30, 640,977,579.45 and 422,783,423.10 is: 634,175,134.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,318,386.30 : 640,977,579.45 = 422,783,423.10 : x
  2. Step 2: Convert to fraction form
    427,318,386.30/640,977,579.45 = 422,783,423.10/x
  3. Step 3: Cross multiply
    427,318,386.30x = 640,977,579.45 × 422,783,423.10
  4. Step 4: Simplify right side
    427,318,386.30x = 270,994,695,170,223,264
  5. Step 5: Solve for x
    x = 270,994,695,170,223,264/427,318,386.30
  6. Step 6: Final answer
    x = 634,175,134.65

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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.