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Finding the Fourth Proportional to 553,615, 763,988.70 and 298,966.20

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Solution

The fourth proportional to 553,615, 763,988.70 and 298,966.20 is: 412,573.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,615 : 763,988.70 = 298,966.20 : x
  2. Step 2: Convert to fraction form
    553,615/763,988.70 = 298,966.20/x
  3. Step 3: Cross multiply
    553,615x = 763,988.70 × 298,966.20
  4. Step 4: Simplify right side
    553,615x = 228,406,798,481.94
  5. Step 5: Solve for x
    x = 228,406,798,481.94/553,615
  6. Step 6: Final answer
    x = 412,573.36

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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.