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Finding the Fourth Proportional to 355,817.71, 490,980.01 and 212,547.34

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Solution

The fourth proportional to 355,817.71, 490,980.01 and 212,547.34 is: 293,286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,817.71 : 490,980.01 = 212,547.34 : x
  2. Step 2: Convert to fraction form
    355,817.71/490,980.01 = 212,547.34/x
  3. Step 3: Cross multiply
    355,817.71x = 490,980.01 × 212,547.34
  4. Step 4: Simplify right side
    355,817.71x = 104,356,495,118.67
  5. Step 5: Solve for x
    x = 104,356,495,118.67/355,817.71
  6. Step 6: Final answer
    x = 293,286.40

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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.