Home / 1,019,530,995.40-1,406,443,438.74-643,653,428.68

Finding the Fourth Proportional to 1,019,530,995.40, 1,406,443,438.74 and 643,653,428.68

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Solution

The fourth proportional to 1,019,530,995.40, 1,406,443,438.74 and 643,653,428.68 is: 887,920,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019,530,995.40 : 1,406,443,438.74 = 643,653,428.68 : x
  2. Step 2: Convert to fraction form
    1,019,530,995.40/1,406,443,438.74 = 643,653,428.68/x
  3. Step 3: Cross multiply
    1,019,530,995.40x = 1,406,443,438.74 × 643,653,428.68
  4. Step 4: Simplify right side
    1,019,530,995.40x = 905,262,141,589,490,432
  5. Step 5: Solve for x
    x = 905,262,141,589,490,432/1,019,530,995.40
  6. Step 6: Final answer
    x = 887,920,176.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.