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Finding the Fourth Proportional to 586,346.21, 809,159.33 and 318,074.21

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Solution

The fourth proportional to 586,346.21, 809,159.33 and 318,074.21 is: 438,943.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,346.21 : 809,159.33 = 318,074.21 : x
  2. Step 2: Convert to fraction form
    586,346.21/809,159.33 = 318,074.21/x
  3. Step 3: Cross multiply
    586,346.21x = 809,159.33 × 318,074.21
  4. Step 4: Simplify right side
    586,346.21x = 257,372,713,063.51
  5. Step 5: Solve for x
    x = 257,372,713,063.51/586,346.21
  6. Step 6: Final answer
    x = 438,943.25

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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.