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Finding the Fourth Proportional to 647,401.80, 971,394.30 and 310,312.20

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Solution

The fourth proportional to 647,401.80, 971,394.30 and 310,312.20 is: 465,608.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,401.80 : 971,394.30 = 310,312.20 : x
  2. Step 2: Convert to fraction form
    647,401.80/971,394.30 = 310,312.20/x
  3. Step 3: Cross multiply
    647,401.80x = 971,394.30 × 310,312.20
  4. Step 4: Simplify right side
    647,401.80x = 301,435,502,300.46
  5. Step 5: Solve for x
    x = 301,435,502,300.46/647,401.80
  6. Step 6: Final answer
    x = 465,608.07

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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.