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Finding the Fourth Proportional to 646,076.77, 891,594.39 and 355,722.10

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Solution

The fourth proportional to 646,076.77, 891,594.39 and 355,722.10 is: 490,901.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,076.77 : 891,594.39 = 355,722.10 : x
  2. Step 2: Convert to fraction form
    646,076.77/891,594.39 = 355,722.10/x
  3. Step 3: Cross multiply
    646,076.77x = 891,594.39 × 355,722.10
  4. Step 4: Simplify right side
    646,076.77x = 317,159,828,759.02
  5. Step 5: Solve for x
    x = 317,159,828,759.02/646,076.77
  6. Step 6: Final answer
    x = 490,901.15

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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.