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Finding the Fourth Proportional to 390,053.84, 538,312.48 and 237,078.64

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Solution

The fourth proportional to 390,053.84, 538,312.48 and 237,078.64 is: 327,191.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,053.84 : 538,312.48 = 237,078.64 : x
  2. Step 2: Convert to fraction form
    390,053.84/538,312.48 = 237,078.64/x
  3. Step 3: Cross multiply
    390,053.84x = 538,312.48 × 237,078.64
  4. Step 4: Simplify right side
    390,053.84x = 127,622,390,653.43
  5. Step 5: Solve for x
    x = 127,622,390,653.43/390,053.84
  6. Step 6: Final answer
    x = 327,191.73

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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.