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Finding the Fourth Proportional to 274,638.40, 385,323.20 and 274,638.40

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Solution

The fourth proportional to 274,638.40, 385,323.20 and 274,638.40 is: 385,323.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,638.40 : 385,323.20 = 274,638.40 : x
  2. Step 2: Convert to fraction form
    274,638.40/385,323.20 = 274,638.40/x
  3. Step 3: Cross multiply
    274,638.40x = 385,323.20 × 274,638.40
  4. Step 4: Simplify right side
    274,638.40x = 105,824,547,130.88
  5. Step 5: Solve for x
    x = 105,824,547,130.88/274,638.40
  6. Step 6: Final answer
    x = 385,323.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.