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Finding the Fourth Proportional to 673,838.19, 929,787.01 and 398,157.71

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Solution

The fourth proportional to 673,838.19, 929,787.01 and 398,157.71 is: 549,392.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,838.19 : 929,787.01 = 398,157.71 : x
  2. Step 2: Convert to fraction form
    673,838.19/929,787.01 = 398,157.71/x
  3. Step 3: Cross multiply
    673,838.19x = 929,787.01 × 398,157.71
  4. Step 4: Simplify right side
    673,838.19x = 370,201,866,689.35
  5. Step 5: Solve for x
    x = 370,201,866,689.35/673,838.19
  6. Step 6: Final answer
    x = 549,392.82

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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.