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Finding the Fourth Proportional to 374,602.40, 516,908.88 and 221,645.28

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Solution

The fourth proportional to 374,602.40, 516,908.88 and 221,645.28 is: 305,845.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,602.40 : 516,908.88 = 221,645.28 : x
  2. Step 2: Convert to fraction form
    374,602.40/516,908.88 = 221,645.28/x
  3. Step 3: Cross multiply
    374,602.40x = 516,908.88 × 221,645.28
  4. Step 4: Simplify right side
    374,602.40x = 114,570,413,442.09
  5. Step 5: Solve for x
    x = 114,570,413,442.09/374,602.40
  6. Step 6: Final answer
    x = 305,845.38

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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.