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Finding the Fourth Proportional to 586,669.25, 809,603.90 and 318,397.25

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Solution

The fourth proportional to 586,669.25, 809,603.90 and 318,397.25 is: 439,388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,669.25 : 809,603.90 = 318,397.25 : x
  2. Step 2: Convert to fraction form
    586,669.25/809,603.90 = 318,397.25/x
  3. Step 3: Cross multiply
    586,669.25x = 809,603.90 × 318,397.25
  4. Step 4: Simplify right side
    586,669.25x = 257,775,649,709.27
  5. Step 5: Solve for x
    x = 257,775,649,709.27/586,669.25
  6. Step 6: Final answer
    x = 439,388.38

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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.