Home / 1,186,318.78-1,779,110.47-428,062.20

Finding the Fourth Proportional to 1,186,318.78, 1,779,110.47 and 428,062.20

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Solution

The fourth proportional to 1,186,318.78, 1,779,110.47 and 428,062.20 is: 641,960.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,318.78 : 1,779,110.47 = 428,062.20 : x
  2. Step 2: Convert to fraction form
    1,186,318.78/1,779,110.47 = 428,062.20/x
  3. Step 3: Cross multiply
    1,186,318.78x = 1,779,110.47 × 428,062.20
  4. Step 4: Simplify right side
    1,186,318.78x = 761,569,941,831.23
  5. Step 5: Solve for x
    x = 761,569,941,831.23/1,186,318.78
  6. Step 6: Final answer
    x = 641,960.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.