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Finding the Fourth Proportional to 928,000.40, 1,392,000.60 and 912,448.40

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Solution

The fourth proportional to 928,000.40, 1,392,000.60 and 912,448.40 is: 1,368,672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,000.40 : 1,392,000.60 = 912,448.40 : x
  2. Step 2: Convert to fraction form
    928,000.40/1,392,000.60 = 912,448.40/x
  3. Step 3: Cross multiply
    928,000.40x = 1,392,000.60 × 912,448.40
  4. Step 4: Simplify right side
    928,000.40x = 1,270,128,720,269.04
  5. Step 5: Solve for x
    x = 1,270,128,720,269.04/928,000.40
  6. Step 6: Final answer
    x = 1,368,672.60

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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.