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Finding the Fourth Proportional to 880,813.65, 1,215,528.95 and 478,405.65

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Solution

The fourth proportional to 880,813.65, 1,215,528.95 and 478,405.65 is: 660,203.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,813.65 : 1,215,528.95 = 478,405.65 : x
  2. Step 2: Convert to fraction form
    880,813.65/1,215,528.95 = 478,405.65/x
  3. Step 3: Cross multiply
    880,813.65x = 1,215,528.95 × 478,405.65
  4. Step 4: Simplify right side
    880,813.65x = 581,515,915,026.54
  5. Step 5: Solve for x
    x = 581,515,915,026.54/880,813.65
  6. Step 6: Final answer
    x = 660,203.11

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.