Home / 389,583,142-537,641,635.80-215,742,886

Finding the Fourth Proportional to 389,583,142, 537,641,635.80 and 215,742,886

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Solution

The fourth proportional to 389,583,142, 537,641,635.80 and 215,742,886 is: 297,734,541.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,583,142 : 537,641,635.80 = 215,742,886 : x
  2. Step 2: Convert to fraction form
    389,583,142/537,641,635.80 = 215,742,886/x
  3. Step 3: Cross multiply
    389,583,142x = 537,641,635.80 × 215,742,886
  4. Step 4: Simplify right side
    389,583,142x = 115,992,358,141,252,912
  5. Step 5: Solve for x
    x = 115,992,358,141,252,912/389,583,142
  6. Step 6: Final answer
    x = 297,734,541.45

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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.