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Finding the Fourth Proportional to 645,734.54, 891,113.54 and 359,254.56

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Solution

The fourth proportional to 645,734.54, 891,113.54 and 359,254.56 is: 495,771.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,734.54 : 891,113.54 = 359,254.56 : x
  2. Step 2: Convert to fraction form
    645,734.54/891,113.54 = 359,254.56/x
  3. Step 3: Cross multiply
    645,734.54x = 891,113.54 × 359,254.56
  4. Step 4: Simplify right side
    645,734.54x = 320,136,602,722.74
  5. Step 5: Solve for x
    x = 320,136,602,722.74/645,734.54
  6. Step 6: Final answer
    x = 495,771.22

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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.