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Finding the Fourth Proportional to 615,385.41, 921,290.49 and 358,434.51

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Solution

The fourth proportional to 615,385.41, 921,290.49 and 358,434.51 is: 536,610.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,385.41 : 921,290.49 = 358,434.51 : x
  2. Step 2: Convert to fraction form
    615,385.41/921,290.49 = 358,434.51/x
  3. Step 3: Cross multiply
    615,385.41x = 921,290.49 × 358,434.51
  4. Step 4: Simplify right side
    615,385.41x = 330,222,305,350.81
  5. Step 5: Solve for x
    x = 330,222,305,350.81/615,385.41
  6. Step 6: Final answer
    x = 536,610.55

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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.