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Finding the Fourth Proportional to 676,655.40, 933,883.92 and 390,119.52

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Solution

The fourth proportional to 676,655.40, 933,883.92 and 390,119.52 is: 538,422.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,655.40 : 933,883.92 = 390,119.52 : x
  2. Step 2: Convert to fraction form
    676,655.40/933,883.92 = 390,119.52/x
  3. Step 3: Cross multiply
    676,655.40x = 933,883.92 × 390,119.52
  4. Step 4: Simplify right side
    676,655.40x = 364,326,346,606.12
  5. Step 5: Solve for x
    x = 364,326,346,606.12/676,655.40
  6. Step 6: Final answer
    x = 538,422.28

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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.