Home / 678,457.40-1,017,686.10-235,270.20

Finding the Fourth Proportional to 678,457.40, 1,017,686.10 and 235,270.20

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Solution

The fourth proportional to 678,457.40, 1,017,686.10 and 235,270.20 is: 352,905.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,457.40 : 1,017,686.10 = 235,270.20 : x
  2. Step 2: Convert to fraction form
    678,457.40/1,017,686.10 = 235,270.20/x
  3. Step 3: Cross multiply
    678,457.40x = 1,017,686.10 × 235,270.20
  4. Step 4: Simplify right side
    678,457.40x = 239,431,212,284.22
  5. Step 5: Solve for x
    x = 239,431,212,284.22/678,457.40
  6. Step 6: Final answer
    x = 352,905.30

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Half scale
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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.