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Finding the Fourth Proportional to 646,411.20, 970,192.80 and 379,838.40

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Solution

The fourth proportional to 646,411.20, 970,192.80 and 379,838.40 is: 570,096.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,411.20 : 970,192.80 = 379,838.40 : x
  2. Step 2: Convert to fraction form
    646,411.20/970,192.80 = 379,838.40/x
  3. Step 3: Cross multiply
    646,411.20x = 970,192.80 × 379,838.40
  4. Step 4: Simplify right side
    646,411.20x = 368,516,480,843.52
  5. Step 5: Solve for x
    x = 368,516,480,843.52/646,411.20
  6. Step 6: Final answer
    x = 570,096.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.