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Finding the Fourth Proportional to 586,518.40, 809,404.80 and 318,246.40

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Solution

The fourth proportional to 586,518.40, 809,404.80 and 318,246.40 is: 439,185.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,518.40 : 809,404.80 = 318,246.40 : x
  2. Step 2: Convert to fraction form
    586,518.40/809,404.80 = 318,246.40/x
  3. Step 3: Cross multiply
    586,518.40x = 809,404.80 × 318,246.40
  4. Step 4: Simplify right side
    586,518.40x = 257,590,163,742.72
  5. Step 5: Solve for x
    x = 257,590,163,742.72/586,518.40
  6. Step 6: Final answer
    x = 439,185.14

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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.