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Finding the Fourth Proportional to 672,903.30, 928,627.29 and 386,480.82

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Solution

The fourth proportional to 672,903.30, 928,627.29 and 386,480.82 is: 533,355.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,903.30 : 928,627.29 = 386,480.82 : x
  2. Step 2: Convert to fraction form
    672,903.30/928,627.29 = 386,480.82/x
  3. Step 3: Cross multiply
    672,903.30x = 928,627.29 × 386,480.82
  4. Step 4: Simplify right side
    672,903.30x = 358,896,636,513.58
  5. Step 5: Solve for x
    x = 358,896,636,513.58/672,903.30
  6. Step 6: Final answer
    x = 533,355.44

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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.