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Finding the Fourth Proportional to 763,605.60, 1,145,408.40 and 427,682.40

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Solution

The fourth proportional to 763,605.60, 1,145,408.40 and 427,682.40 is: 641,523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,605.60 : 1,145,408.40 = 427,682.40 : x
  2. Step 2: Convert to fraction form
    763,605.60/1,145,408.40 = 427,682.40/x
  3. Step 3: Cross multiply
    763,605.60x = 1,145,408.40 × 427,682.40
  4. Step 4: Simplify right side
    763,605.60x = 489,871,013,492.16
  5. Step 5: Solve for x
    x = 489,871,013,492.16/763,605.60
  6. Step 6: Final answer
    x = 641,523.60

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1.5x scale

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.