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Finding the Fourth Proportional to 385,335.64, 531,411.90 and 330,870.79

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Solution

The fourth proportional to 385,335.64, 531,411.90 and 330,870.79 is: 456,300.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,335.64 : 531,411.90 = 330,870.79 : x
  2. Step 2: Convert to fraction form
    385,335.64/531,411.90 = 330,870.79/x
  3. Step 3: Cross multiply
    385,335.64x = 531,411.90 × 330,870.79
  4. Step 4: Simplify right side
    385,335.64x = 175,828,672,511.34
  5. Step 5: Solve for x
    x = 175,828,672,511.34/385,335.64
  6. Step 6: Final answer
    x = 456,300.06

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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.