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Finding the Fourth Proportional to 478,886.20, 718,329.30 and 385,574.20

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Solution

The fourth proportional to 478,886.20, 718,329.30 and 385,574.20 is: 578,361.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,886.20 : 718,329.30 = 385,574.20 : x
  2. Step 2: Convert to fraction form
    478,886.20/718,329.30 = 385,574.20/x
  3. Step 3: Cross multiply
    478,886.20x = 718,329.30 × 385,574.20
  4. Step 4: Simplify right side
    478,886.20x = 276,969,245,184.06
  5. Step 5: Solve for x
    x = 276,969,245,184.06/478,886.20
  6. Step 6: Final answer
    x = 578,361.30

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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.