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Finding the Fourth Proportional to 645,930.54, 891,377.73 and 359,445.69

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Solution

The fourth proportional to 645,930.54, 891,377.73 and 359,445.69 is: 496,031.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,930.54 : 891,377.73 = 359,445.69 : x
  2. Step 2: Convert to fraction form
    645,930.54/891,377.73 = 359,445.69/x
  3. Step 3: Cross multiply
    645,930.54x = 891,377.73 × 359,445.69
  4. Step 4: Simplify right side
    645,930.54x = 320,401,883,210.48
  5. Step 5: Solve for x
    x = 320,401,883,210.48/645,930.54
  6. Step 6: Final answer
    x = 496,031.48

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1.5x scale

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.