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Finding the Fourth Proportional to 403,000.69, 556,140.94 and 221,708.72

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Solution

The fourth proportional to 403,000.69, 556,140.94 and 221,708.72 is: 305,958.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,000.69 : 556,140.94 = 221,708.72 : x
  2. Step 2: Convert to fraction form
    403,000.69/556,140.94 = 221,708.72/x
  3. Step 3: Cross multiply
    403,000.69x = 556,140.94 × 221,708.72
  4. Step 4: Simplify right side
    403,000.69x = 123,301,292,612.02
  5. Step 5: Solve for x
    x = 123,301,292,612.02/403,000.69
  6. Step 6: Final answer
    x = 305,958.02

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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.