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Finding the Fourth Proportional to 285,432,938.80, 400,412,330 and 285,432,938.80

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Solution

The fourth proportional to 285,432,938.80, 400,412,330 and 285,432,938.80 is: 400,412,330

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,432,938.80 : 400,412,330 = 285,432,938.80 : x
  2. Step 2: Convert to fraction form
    285,432,938.80/400,412,330 = 285,432,938.80/x
  3. Step 3: Cross multiply
    285,432,938.80x = 400,412,330 × 285,432,938.80
  4. Step 4: Simplify right side
    285,432,938.80x = 114,290,868,083,655,408
  5. Step 5: Solve for x
    x = 114,290,868,083,655,408/285,432,938.80
  6. Step 6: Final answer
    x = 400,412,330

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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.