Home / 1,210,143.93-1,670,515.50-861,509.40

Finding the Fourth Proportional to 1,210,143.93, 1,670,515.50 and 861,509.40

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Solution

The fourth proportional to 1,210,143.93, 1,670,515.50 and 861,509.40 is: 1,189,250.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,143.93 : 1,670,515.50 = 861,509.40 : x
  2. Step 2: Convert to fraction form
    1,210,143.93/1,670,515.50 = 861,509.40/x
  3. Step 3: Cross multiply
    1,210,143.93x = 1,670,515.50 × 861,509.40
  4. Step 4: Simplify right side
    1,210,143.93x = 1,439,164,806,095.70
  5. Step 5: Solve for x
    x = 1,439,164,806,095.70/1,210,143.93
  6. Step 6: Final answer
    x = 1,189,250.94

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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.