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Finding the Fourth Proportional to 478,679.29, 660,603.41 and 274,728.58

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Solution

The fourth proportional to 478,679.29, 660,603.41 and 274,728.58 is: 379,140.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,679.29 : 660,603.41 = 274,728.58 : x
  2. Step 2: Convert to fraction form
    478,679.29/660,603.41 = 274,728.58/x
  3. Step 3: Cross multiply
    478,679.29x = 660,603.41 × 274,728.58
  4. Step 4: Simplify right side
    478,679.29x = 181,486,636,772.46
  5. Step 5: Solve for x
    x = 181,486,636,772.46/478,679.29
  6. Step 6: Final answer
    x = 379,140.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.