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Finding the Fourth Proportional to 390,210.39, 538,558.88 and 226,917.50

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Solution

The fourth proportional to 390,210.39, 538,558.88 and 226,917.50 is: 313,186.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,210.39 : 538,558.88 = 226,917.50 : x
  2. Step 2: Convert to fraction form
    390,210.39/538,558.88 = 226,917.50/x
  3. Step 3: Cross multiply
    390,210.39x = 538,558.88 × 226,917.50
  4. Step 4: Simplify right side
    390,210.39x = 122,208,430,825.02
  5. Step 5: Solve for x
    x = 122,208,430,825.02/390,210.39
  6. Step 6: Final answer
    x = 313,186.00

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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.