Home / 1,021,077.60-1,409,063.76-639,314.88

Finding the Fourth Proportional to 1,021,077.60, 1,409,063.76 and 639,314.88

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Solution

The fourth proportional to 1,021,077.60, 1,409,063.76 and 639,314.88 is: 882,239.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021,077.60 : 1,409,063.76 = 639,314.88 : x
  2. Step 2: Convert to fraction form
    1,021,077.60/1,409,063.76 = 639,314.88/x
  3. Step 3: Cross multiply
    1,021,077.60x = 1,409,063.76 × 639,314.88
  4. Step 4: Simplify right side
    1,021,077.60x = 900,835,428,636.75
  5. Step 5: Solve for x
    x = 900,835,428,636.75/1,021,077.60
  6. Step 6: Final answer
    x = 882,239.93

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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.