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Finding the Fourth Proportional to 628,643.40, 942,965.10 and 452,808.60

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Solution

The fourth proportional to 628,643.40, 942,965.10 and 452,808.60 is: 679,212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,643.40 : 942,965.10 = 452,808.60 : x
  2. Step 2: Convert to fraction form
    628,643.40/942,965.10 = 452,808.60/x
  3. Step 3: Cross multiply
    628,643.40x = 942,965.10 × 452,808.60
  4. Step 4: Simplify right side
    628,643.40x = 426,982,706,779.86
  5. Step 5: Solve for x
    x = 426,982,706,779.86/628,643.40
  6. Step 6: Final answer
    x = 679,212.90

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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.