Home / 389,583,142.50-537,641,636.49-215,742,886.50

Finding the Fourth Proportional to 389,583,142.50, 537,641,636.49 and 215,742,886.50

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Solution

The fourth proportional to 389,583,142.50, 537,641,636.49 and 215,742,886.50 is: 297,734,542.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,583,142.50 : 537,641,636.49 = 215,742,886.50 : x
  2. Step 2: Convert to fraction form
    389,583,142.50/537,641,636.49 = 215,742,886.50/x
  3. Step 3: Cross multiply
    389,583,142.50x = 537,641,636.49 × 215,742,886.50
  4. Step 4: Simplify right side
    389,583,142.50x = 115,992,358,558,936,336
  5. Step 5: Solve for x
    x = 115,992,358,558,936,336/389,583,142.50
  6. Step 6: Final answer
    x = 297,734,542.14

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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.