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Finding the Fourth Proportional to 562,960.45, 776,940.88 and 321,279.40

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Solution

The fourth proportional to 562,960.45, 776,940.88 and 321,279.40 is: 443,397.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    562,960.45 : 776,940.88 = 321,279.40 : x
  2. Step 2: Convert to fraction form
    562,960.45/776,940.88 = 321,279.40/x
  3. Step 3: Cross multiply
    562,960.45x = 776,940.88 × 321,279.40
  4. Step 4: Simplify right side
    562,960.45x = 249,615,095,877.17
  5. Step 5: Solve for x
    x = 249,615,095,877.17/562,960.45
  6. Step 6: Final answer
    x = 443,397.22

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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.