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Finding the Fourth Proportional to 876,343.40, 1,314,515.10 and 343,881.80

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Solution

The fourth proportional to 876,343.40, 1,314,515.10 and 343,881.80 is: 515,822.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,343.40 : 1,314,515.10 = 343,881.80 : x
  2. Step 2: Convert to fraction form
    876,343.40/1,314,515.10 = 343,881.80/x
  3. Step 3: Cross multiply
    876,343.40x = 1,314,515.10 × 343,881.80
  4. Step 4: Simplify right side
    876,343.40x = 452,037,818,715.18
  5. Step 5: Solve for x
    x = 452,037,818,715.18/876,343.40
  6. Step 6: Final answer
    x = 515,822.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.