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Finding the Fourth Proportional to 484,358.49, 668,507.28 and 320,726.40

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Solution

The fourth proportional to 484,358.49, 668,507.28 and 320,726.40 is: 442,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,358.49 : 668,507.28 = 320,726.40 : x
  2. Step 2: Convert to fraction form
    484,358.49/668,507.28 = 320,726.40/x
  3. Step 3: Cross multiply
    484,358.49x = 668,507.28 × 320,726.40
  4. Step 4: Simplify right side
    484,358.49x = 214,407,933,288.19
  5. Step 5: Solve for x
    x = 214,407,933,288.19/484,358.49
  6. Step 6: Final answer
    x = 442,663.72

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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.