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Finding the Fourth Proportional to 648,363.20, 971,888.70 and 381,986.60

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Solution

The fourth proportional to 648,363.20, 971,888.70 and 381,986.60 is: 572,593.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,363.20 : 971,888.70 = 381,986.60 : x
  2. Step 2: Convert to fraction form
    648,363.20/971,888.70 = 381,986.60/x
  3. Step 3: Cross multiply
    648,363.20x = 971,888.70 × 381,986.60
  4. Step 4: Simplify right side
    648,363.20x = 371,248,460,091.42
  5. Step 5: Solve for x
    x = 371,248,460,091.42/648,363.20
  6. Step 6: Final answer
    x = 572,593.36

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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.