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Finding the Fourth Proportional to 478,239.83, 659,945.66 and 274,280.21

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Solution

The fourth proportional to 478,239.83, 659,945.66 and 274,280.21 is: 378,492.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,239.83 : 659,945.66 = 274,280.21 : x
  2. Step 2: Convert to fraction form
    478,239.83/659,945.66 = 274,280.21/x
  3. Step 3: Cross multiply
    478,239.83x = 659,945.66 × 274,280.21
  4. Step 4: Simplify right side
    478,239.83x = 181,010,030,913.66
  5. Step 5: Solve for x
    x = 181,010,030,913.66/478,239.83
  6. Step 6: Final answer
    x = 378,492.17

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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.