Home / 809,746.47-1,215,356.81-430,985.21

Finding the Fourth Proportional to 809,746.47, 1,215,356.81 and 430,985.21

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Solution

The fourth proportional to 809,746.47, 1,215,356.81 and 430,985.21 is: 646,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,746.47 : 1,215,356.81 = 430,985.21 : x
  2. Step 2: Convert to fraction form
    809,746.47/1,215,356.81 = 430,985.21/x
  3. Step 3: Cross multiply
    809,746.47x = 1,215,356.81 × 430,985.21
  4. Step 4: Simplify right side
    809,746.47x = 523,800,801,751.07
  5. Step 5: Solve for x
    x = 523,800,801,751.07/809,746.47
  6. Step 6: Final answer
    x = 646,870.13

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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.