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Finding the Fourth Proportional to 657,491.60, 986,237.40 and 421,295.60

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Solution

The fourth proportional to 657,491.60, 986,237.40 and 421,295.60 is: 631,943.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,491.60 : 986,237.40 = 421,295.60 : x
  2. Step 2: Convert to fraction form
    657,491.60/986,237.40 = 421,295.60/x
  3. Step 3: Cross multiply
    657,491.60x = 986,237.40 × 421,295.60
  4. Step 4: Simplify right side
    657,491.60x = 415,497,477,175.44
  5. Step 5: Solve for x
    x = 415,497,477,175.44/657,491.60
  6. Step 6: Final answer
    x = 631,943.40

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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.