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Finding the Fourth Proportional to 731,649.84, 1,009,715.88 and 409,340.64

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Solution

The fourth proportional to 731,649.84, 1,009,715.88 and 409,340.64 is: 564,911.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    731,649.84 : 1,009,715.88 = 409,340.64 : x
  2. Step 2: Convert to fraction form
    731,649.84/1,009,715.88 = 409,340.64/x
  3. Step 3: Cross multiply
    731,649.84x = 1,009,715.88 × 409,340.64
  4. Step 4: Simplify right side
    731,649.84x = 413,317,744,537.36
  5. Step 5: Solve for x
    x = 413,317,744,537.36/731,649.84
  6. Step 6: Final answer
    x = 564,911.96

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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.