Home / 1,019,530,996.40-1,406,443,440.12-643,653,429.68

Finding the Fourth Proportional to 1,019,530,996.40, 1,406,443,440.12 and 643,653,429.68

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Solution

The fourth proportional to 1,019,530,996.40, 1,406,443,440.12 and 643,653,429.68 is: 887,920,178.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019,530,996.40 : 1,406,443,440.12 = 643,653,429.68 : x
  2. Step 2: Convert to fraction form
    1,019,530,996.40/1,406,443,440.12 = 643,653,429.68/x
  3. Step 3: Cross multiply
    1,019,530,996.40x = 1,406,443,440.12 × 643,653,429.68
  4. Step 4: Simplify right side
    1,019,530,996.40x = 905,262,143,884,175,616
  5. Step 5: Solve for x
    x = 905,262,143,884,175,616/1,019,530,996.40
  6. Step 6: Final answer
    x = 887,920,178.08

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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.