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Finding the Fourth Proportional to 478,408.58, 660,158.40 and 274,476.30

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Solution

The fourth proportional to 478,408.58, 660,158.40 and 274,476.30 is: 378,751.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,408.58 : 660,158.40 = 274,476.30 : x
  2. Step 2: Convert to fraction form
    478,408.58/660,158.40 = 274,476.30/x
  3. Step 3: Cross multiply
    478,408.58x = 660,158.40 × 274,476.30
  4. Step 4: Simplify right side
    478,408.58x = 181,197,833,599.61
  5. Step 5: Solve for x
    x = 181,197,833,599.61/478,408.58
  6. Step 6: Final answer
    x = 378,751.22

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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.