Home / 1,238,603,999.40-1,857,905,999.10-420,716,300.40

Finding the Fourth Proportional to 1,238,603,999.40, 1,857,905,999.10 and 420,716,300.40

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Solution

The fourth proportional to 1,238,603,999.40, 1,857,905,999.10 and 420,716,300.40 is: 631,074,450.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,603,999.40 : 1,857,905,999.10 = 420,716,300.40 : x
  2. Step 2: Convert to fraction form
    1,238,603,999.40/1,857,905,999.10 = 420,716,300.40/x
  3. Step 3: Cross multiply
    1,238,603,999.40x = 1,857,905,999.10 × 420,716,300.40
  4. Step 4: Simplify right side
    1,238,603,999.40x = 781,651,338,432,317,696
  5. Step 5: Solve for x
    x = 781,651,338,432,317,696/1,238,603,999.40
  6. Step 6: Final answer
    x = 631,074,450.60

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1.5x scale

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.