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Finding the Fourth Proportional to 578,145.60, 867,218.40 and 204,206.40

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Solution

The fourth proportional to 578,145.60, 867,218.40 and 204,206.40 is: 306,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,145.60 : 867,218.40 = 204,206.40 : x
  2. Step 2: Convert to fraction form
    578,145.60/867,218.40 = 204,206.40/x
  3. Step 3: Cross multiply
    578,145.60x = 867,218.40 × 204,206.40
  4. Step 4: Simplify right side
    578,145.60x = 177,091,547,477.76
  5. Step 5: Solve for x
    x = 177,091,547,477.76/578,145.60
  6. Step 6: Final answer
    x = 306,309.60

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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.