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Finding the Fourth Proportional to 676,401.36, 931,309.38 and 574,215

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Solution

The fourth proportional to 676,401.36, 931,309.38 and 574,215 is: 790,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,401.36 : 931,309.38 = 574,215 : x
  2. Step 2: Convert to fraction form
    676,401.36/931,309.38 = 574,215/x
  3. Step 3: Cross multiply
    676,401.36x = 931,309.38 × 574,215
  4. Step 4: Simplify right side
    676,401.36x = 534,771,815,636.70
  5. Step 5: Solve for x
    x = 534,771,815,636.70/676,401.36
  6. Step 6: Final answer
    x = 790,613.16

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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.