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Finding the Fourth Proportional to 645,708.48, 891,065.52 and 359,227.68

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Solution

The fourth proportional to 645,708.48, 891,065.52 and 359,227.68 is: 495,727.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,708.48 : 891,065.52 = 359,227.68 : x
  2. Step 2: Convert to fraction form
    645,708.48/891,065.52 = 359,227.68/x
  3. Step 3: Cross multiply
    645,708.48x = 891,065.52 × 359,227.68
  4. Step 4: Simplify right side
    645,708.48x = 320,095,399,477.59
  5. Step 5: Solve for x
    x = 320,095,399,477.59/645,708.48
  6. Step 6: Final answer
    x = 495,727.42

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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.