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Finding the Fourth Proportional to 648,072.80, 972,109.20 and 611,331.20

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Solution

The fourth proportional to 648,072.80, 972,109.20 and 611,331.20 is: 916,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,072.80 : 972,109.20 = 611,331.20 : x
  2. Step 2: Convert to fraction form
    648,072.80/972,109.20 = 611,331.20/x
  3. Step 3: Cross multiply
    648,072.80x = 972,109.20 × 611,331.20
  4. Step 4: Simplify right side
    648,072.80x = 594,280,683,767.04
  5. Step 5: Solve for x
    x = 594,280,683,767.04/648,072.80
  6. Step 6: Final answer
    x = 916,996.80

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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.