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Finding the Fourth Proportional to 448,087.20, 672,130.80 and 399,098.40

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Solution

The fourth proportional to 448,087.20, 672,130.80 and 399,098.40 is: 598,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,087.20 : 672,130.80 = 399,098.40 : x
  2. Step 2: Convert to fraction form
    448,087.20/672,130.80 = 399,098.40/x
  3. Step 3: Cross multiply
    448,087.20x = 672,130.80 × 399,098.40
  4. Step 4: Simplify right side
    448,087.20x = 268,246,326,870.72
  5. Step 5: Solve for x
    x = 268,246,326,870.72/448,087.20
  6. Step 6: Final answer
    x = 598,647.60

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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.