Home / 648,128.80-972,193.20-618,604.30

Finding the Fourth Proportional to 648,128.80, 972,193.20 and 618,604.30

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Solution

The fourth proportional to 648,128.80, 972,193.20 and 618,604.30 is: 927,906.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,128.80 : 972,193.20 = 618,604.30 : x
  2. Step 2: Convert to fraction form
    648,128.80/972,193.20 = 618,604.30/x
  3. Step 3: Cross multiply
    648,128.80x = 972,193.20 × 618,604.30
  4. Step 4: Simplify right side
    648,128.80x = 601,402,893,950.76
  5. Step 5: Solve for x
    x = 601,402,893,950.76/648,128.80
  6. Step 6: Final answer
    x = 927,906.45

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Double scale
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Similar ratio
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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.