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Finding the Fourth Proportional to 556,478.40, 834,353.10 and 219,315.90

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Solution

The fourth proportional to 556,478.40, 834,353.10 and 219,315.90 is: 328,830.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,478.40 : 834,353.10 = 219,315.90 : x
  2. Step 2: Convert to fraction form
    556,478.40/834,353.10 = 219,315.90/x
  3. Step 3: Cross multiply
    556,478.40x = 834,353.10 × 219,315.90
  4. Step 4: Simplify right side
    556,478.40x = 182,986,901,044.29
  5. Step 5: Solve for x
    x = 182,986,901,044.29/556,478.40
  6. Step 6: Final answer
    x = 328,830.20

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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.