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Finding the Fourth Proportional to 390,645, 539,130.24 and 237,694.32

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Solution

The fourth proportional to 390,645, 539,130.24 and 237,694.32 is: 328,042.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,645 : 539,130.24 = 237,694.32 : x
  2. Step 2: Convert to fraction form
    390,645/539,130.24 = 237,694.32/x
  3. Step 3: Cross multiply
    390,645x = 539,130.24 × 237,694.32
  4. Step 4: Simplify right side
    390,645x = 128,148,195,788.24
  5. Step 5: Solve for x
    x = 128,148,195,788.24/390,645
  6. Step 6: Final answer
    x = 328,042.59

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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.