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Finding the Fourth Proportional to 676,588.32, 933,679.44 and 390,120.48

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Solution

The fourth proportional to 676,588.32, 933,679.44 and 390,120.48 is: 538,359.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,588.32 : 933,679.44 = 390,120.48 : x
  2. Step 2: Convert to fraction form
    676,588.32/933,679.44 = 390,120.48/x
  3. Step 3: Cross multiply
    676,588.32x = 933,679.44 × 390,120.48
  4. Step 4: Simplify right side
    676,588.32x = 364,247,471,298.93
  5. Step 5: Solve for x
    x = 364,247,471,298.93/676,588.32
  6. Step 6: Final answer
    x = 538,359.09

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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.