Home / 787,062,128.40-1,181,307,029.40-399,154,813.20

Finding the Fourth Proportional to 787,062,128.40, 1,181,307,029.40 and 399,154,813.20

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Solution

The fourth proportional to 787,062,128.40, 1,181,307,029.40 and 399,154,813.20 is: 599,094,238.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,062,128.40 : 1,181,307,029.40 = 399,154,813.20 : x
  2. Step 2: Convert to fraction form
    787,062,128.40/1,181,307,029.40 = 399,154,813.20/x
  3. Step 3: Cross multiply
    787,062,128.40x = 1,181,307,029.40 × 399,154,813.20
  4. Step 4: Simplify right side
    787,062,128.40x = 471,524,386,652,003,904
  5. Step 5: Solve for x
    x = 471,524,386,652,003,904/787,062,128.40
  6. Step 6: Final answer
    x = 599,094,238.74

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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.