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Finding the Fourth Proportional to 586,538.40, 809,432.40 and 318,266.40

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Solution

The fourth proportional to 586,538.40, 809,432.40 and 318,266.40 is: 439,212.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,538.40 : 809,432.40 = 318,266.40 : x
  2. Step 2: Convert to fraction form
    586,538.40/809,432.40 = 318,266.40/x
  3. Step 3: Cross multiply
    586,538.40x = 809,432.40 × 318,266.40
  4. Step 4: Simplify right side
    586,538.40x = 257,615,135,991.36
  5. Step 5: Solve for x
    x = 257,615,135,991.36/586,538.40
  6. Step 6: Final answer
    x = 439,212.74

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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.