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Finding the Fourth Proportional to 646,279.74, 891,730.86 and 374,249.76

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Solution

The fourth proportional to 646,279.74, 891,730.86 and 374,249.76 is: 516,386.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,279.74 : 891,730.86 = 374,249.76 : x
  2. Step 2: Convert to fraction form
    646,279.74/891,730.86 = 374,249.76/x
  3. Step 3: Cross multiply
    646,279.74x = 891,730.86 × 374,249.76
  4. Step 4: Simplify right side
    646,279.74x = 333,730,060,339.59
  5. Step 5: Solve for x
    x = 333,730,060,339.59/646,279.74
  6. Step 6: Final answer
    x = 516,386.39

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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.