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Finding the Fourth Proportional to 403,607.70, 556,978.63 and 222,319.07

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Solution

The fourth proportional to 403,607.70, 556,978.63 and 222,319.07 is: 306,800.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,607.70 : 556,978.63 = 222,319.07 : x
  2. Step 2: Convert to fraction form
    403,607.70/556,978.63 = 222,319.07/x
  3. Step 3: Cross multiply
    403,607.70x = 556,978.63 × 222,319.07
  4. Step 4: Simplify right side
    403,607.70x = 123,826,971,031.47
  5. Step 5: Solve for x
    x = 123,826,971,031.47/403,607.70
  6. Step 6: Final answer
    x = 306,800.32

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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.