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Finding the Fourth Proportional to 385,419.40, 577,394.70 and 207,867.40

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Solution

The fourth proportional to 385,419.40, 577,394.70 and 207,867.40 is: 311,405.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,419.40 : 577,394.70 = 207,867.40 : x
  2. Step 2: Convert to fraction form
    385,419.40/577,394.70 = 207,867.40/x
  3. Step 3: Cross multiply
    385,419.40x = 577,394.70 × 207,867.40
  4. Step 4: Simplify right side
    385,419.40x = 120,021,535,062.78
  5. Step 5: Solve for x
    x = 120,021,535,062.78/385,419.40
  6. Step 6: Final answer
    x = 311,405.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.