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Finding the Fourth Proportional to 686,637, 1,030,239 and 370,721.88

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Solution

The fourth proportional to 686,637, 1,030,239 and 370,721.88 is: 556,235.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,637 : 1,030,239 = 370,721.88 : x
  2. Step 2: Convert to fraction form
    686,637/1,030,239 = 370,721.88/x
  3. Step 3: Cross multiply
    686,637x = 1,030,239 × 370,721.88
  4. Step 4: Simplify right side
    686,637x = 381,932,138,929.32
  5. Step 5: Solve for x
    x = 381,932,138,929.32/686,637
  6. Step 6: Final answer
    x = 556,235.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.