Home / 1,155,405.76-1,594,430.12-639,146.20

Finding the Fourth Proportional to 1,155,405.76, 1,594,430.12 and 639,146.20

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Solution

The fourth proportional to 1,155,405.76, 1,594,430.12 and 639,146.20 is: 882,005.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155,405.76 : 1,594,430.12 = 639,146.20 : x
  2. Step 2: Convert to fraction form
    1,155,405.76/1,594,430.12 = 639,146.20/x
  3. Step 3: Cross multiply
    1,155,405.76x = 1,594,430.12 × 639,146.20
  4. Step 4: Simplify right side
    1,155,405.76x = 1,019,073,949,167.81
  5. Step 5: Solve for x
    x = 1,019,073,949,167.81/1,155,405.76
  6. Step 6: Final answer
    x = 882,005.25

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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.