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Finding the Fourth Proportional to 391,592.51, 540,430.68 and 219,507.71

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Solution

The fourth proportional to 391,592.51, 540,430.68 and 219,507.71 is: 302,939.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,592.51 : 540,430.68 = 219,507.71 : x
  2. Step 2: Convert to fraction form
    391,592.51/540,430.68 = 219,507.71/x
  3. Step 3: Cross multiply
    391,592.51x = 540,430.68 × 219,507.71
  4. Step 4: Simplify right side
    391,592.51x = 118,628,699,101.54
  5. Step 5: Solve for x
    x = 118,628,699,101.54/391,592.51
  6. Step 6: Final answer
    x = 302,939.14

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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.