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Finding the Fourth Proportional to 390,295.81, 538,601.19 and 220,526.29

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Solution

The fourth proportional to 390,295.81, 538,601.19 and 220,526.29 is: 304,322.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,295.81 : 538,601.19 = 220,526.29 : x
  2. Step 2: Convert to fraction form
    390,295.81/538,601.19 = 220,526.29/x
  3. Step 3: Cross multiply
    390,295.81x = 538,601.19 × 220,526.29
  4. Step 4: Simplify right side
    390,295.81x = 118,775,719,527.28
  5. Step 5: Solve for x
    x = 118,775,719,527.28/390,295.81
  6. Step 6: Final answer
    x = 304,322.31

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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.