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Finding the Fourth Proportional to 621,725.41, 857,980.86 and 346,077.28

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Solution

The fourth proportional to 621,725.41, 857,980.86 and 346,077.28 is: 477,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,725.41 : 857,980.86 = 346,077.28 : x
  2. Step 2: Convert to fraction form
    621,725.41/857,980.86 = 346,077.28/x
  3. Step 3: Cross multiply
    621,725.41x = 857,980.86 × 346,077.28
  4. Step 4: Simplify right side
    621,725.41x = 296,927,676,300.57
  5. Step 5: Solve for x
    x = 296,927,676,300.57/621,725.41
  6. Step 6: Final answer
    x = 477,586.52

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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.