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Finding the Fourth Proportional to 586,584.30, 809,486.34 and 318,312.30

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Solution

The fourth proportional to 586,584.30, 809,486.34 and 318,312.30 is: 439,270.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,584.30 : 809,486.34 = 318,312.30 : x
  2. Step 2: Convert to fraction form
    586,584.30/809,486.34 = 318,312.30/x
  3. Step 3: Cross multiply
    586,584.30x = 809,486.34 × 318,312.30
  4. Step 4: Simplify right side
    586,584.30x = 257,669,458,703.98
  5. Step 5: Solve for x
    x = 257,669,458,703.98/586,584.30
  6. Step 6: Final answer
    x = 439,270.98

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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.