Home / 1,277,344.40-1,915,908.60-390,880.40

Finding the Fourth Proportional to 1,277,344.40, 1,915,908.60 and 390,880.40

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Solution

The fourth proportional to 1,277,344.40, 1,915,908.60 and 390,880.40 is: 586,287.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,344.40 : 1,915,908.60 = 390,880.40 : x
  2. Step 2: Convert to fraction form
    1,277,344.40/1,915,908.60 = 390,880.40/x
  3. Step 3: Cross multiply
    1,277,344.40x = 1,915,908.60 × 390,880.40
  4. Step 4: Simplify right side
    1,277,344.40x = 748,891,119,931.44
  5. Step 5: Solve for x
    x = 748,891,119,931.44/1,277,344.40
  6. Step 6: Final answer
    x = 586,287.55

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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.