Home / 1,428,639.76-2,142,898.20-431,338

Finding the Fourth Proportional to 1,428,639.76, 2,142,898.20 and 431,338

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Solution

The fourth proportional to 1,428,639.76, 2,142,898.20 and 431,338 is: 646,988.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,639.76 : 2,142,898.20 = 431,338 : x
  2. Step 2: Convert to fraction form
    1,428,639.76/2,142,898.20 = 431,338/x
  3. Step 3: Cross multiply
    1,428,639.76x = 2,142,898.20 × 431,338
  4. Step 4: Simplify right side
    1,428,639.76x = 924,313,423,791.60
  5. Step 5: Solve for x
    x = 924,313,423,791.60/1,428,639.76
  6. Step 6: Final answer
    x = 646,988.45

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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.