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Finding the Fourth Proportional to 1,389,347.03, 1,916,409.23 and 1,114,364.70

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Solution

The fourth proportional to 1,389,347.03, 1,916,409.23 and 1,114,364.70 is: 1,537,109.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,347.03 : 1,916,409.23 = 1,114,364.70 : x
  2. Step 2: Convert to fraction form
    1,389,347.03/1,916,409.23 = 1,114,364.70/x
  3. Step 3: Cross multiply
    1,389,347.03x = 1,916,409.23 × 1,114,364.70
  4. Step 4: Simplify right side
    1,389,347.03x = 2,135,578,793,017.48
  5. Step 5: Solve for x
    x = 2,135,578,793,017.48/1,389,347.03
  6. Step 6: Final answer
    x = 1,537,109.69

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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.