Home / 389,583,144-537,641,638.56-215,742,888

Finding the Fourth Proportional to 389,583,144, 537,641,638.56 and 215,742,888

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Solution

The fourth proportional to 389,583,144, 537,641,638.56 and 215,742,888 is: 297,734,544.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,583,144 : 537,641,638.56 = 215,742,888 : x
  2. Step 2: Convert to fraction form
    389,583,144/537,641,638.56 = 215,742,888/x
  3. Step 3: Cross multiply
    389,583,144x = 537,641,638.56 × 215,742,888
  4. Step 4: Simplify right side
    389,583,144x = 115,992,359,811,986,544
  5. Step 5: Solve for x
    x = 115,992,359,811,986,544/389,583,144
  6. Step 6: Final answer
    x = 297,734,544.21

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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.