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Finding the Fourth Proportional to 674,722.71, 931,089.94 and 399,259.13

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Solution

The fourth proportional to 674,722.71, 931,089.94 and 399,259.13 is: 550,961.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,722.71 : 931,089.94 = 399,259.13 : x
  2. Step 2: Convert to fraction form
    674,722.71/931,089.94 = 399,259.13/x
  3. Step 3: Cross multiply
    674,722.71x = 931,089.94 × 399,259.13
  4. Step 4: Simplify right side
    674,722.71x = 371,746,153,742.56
  5. Step 5: Solve for x
    x = 371,746,153,742.56/674,722.71
  6. Step 6: Final answer
    x = 550,961.38

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Double scale
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Similar ratio
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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.