Home / 985,280.20-1,478,309.10-386,139.40

Finding the Fourth Proportional to 985,280.20, 1,478,309.10 and 386,139.40

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Solution

The fourth proportional to 985,280.20, 1,478,309.10 and 386,139.40 is: 579,361.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,280.20 : 1,478,309.10 = 386,139.40 : x
  2. Step 2: Convert to fraction form
    985,280.20/1,478,309.10 = 386,139.40/x
  3. Step 3: Cross multiply
    985,280.20x = 1,478,309.10 × 386,139.40
  4. Step 4: Simplify right side
    985,280.20x = 570,833,388,888.54
  5. Step 5: Solve for x
    x = 570,833,388,888.54/985,280.20
  6. Step 6: Final answer
    x = 579,361.47

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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.