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Finding the Fourth Proportional to 403,420.48, 556,720.32 and 222,133.12

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Solution

The fourth proportional to 403,420.48, 556,720.32 and 222,133.12 is: 306,543.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,420.48 : 556,720.32 = 222,133.12 : x
  2. Step 2: Convert to fraction form
    403,420.48/556,720.32 = 222,133.12/x
  3. Step 3: Cross multiply
    403,420.48x = 556,720.32 × 222,133.12
  4. Step 4: Simplify right side
    403,420.48x = 123,666,021,649.00
  5. Step 5: Solve for x
    x = 123,666,021,649.00/403,420.48
  6. Step 6: Final answer
    x = 306,543.74

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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.