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Finding the Fourth Proportional to 478,830.51, 660,790.58 and 263,978.28

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Solution

The fourth proportional to 478,830.51, 660,790.58 and 263,978.28 is: 364,292.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,830.51 : 660,790.58 = 263,978.28 : x
  2. Step 2: Convert to fraction form
    478,830.51/660,790.58 = 263,978.28/x
  3. Step 3: Cross multiply
    478,830.51x = 660,790.58 × 263,978.28
  4. Step 4: Simplify right side
    478,830.51x = 174,434,359,428.71
  5. Step 5: Solve for x
    x = 174,434,359,428.71/478,830.51
  6. Step 6: Final answer
    x = 364,292.49

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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.