Home / 427,923,005.70-641,884,508.55-399,012,615.30

Finding the Fourth Proportional to 427,923,005.70, 641,884,508.55 and 399,012,615.30

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Solution

The fourth proportional to 427,923,005.70, 641,884,508.55 and 399,012,615.30 is: 598,518,922.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,923,005.70 : 641,884,508.55 = 399,012,615.30 : x
  2. Step 2: Convert to fraction form
    427,923,005.70/641,884,508.55 = 399,012,615.30/x
  3. Step 3: Cross multiply
    427,923,005.70x = 641,884,508.55 × 399,012,615.30
  4. Step 4: Simplify right side
    427,923,005.70x = 256,120,016,477,090,688
  5. Step 5: Solve for x
    x = 256,120,016,477,090,688/427,923,005.70
  6. Step 6: Final answer
    x = 598,518,922.95

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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.