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Finding the Fourth Proportional to 880,403.40, 1,320,605.10 and 319,235.40

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Solution

The fourth proportional to 880,403.40, 1,320,605.10 and 319,235.40 is: 478,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,403.40 : 1,320,605.10 = 319,235.40 : x
  2. Step 2: Convert to fraction form
    880,403.40/1,320,605.10 = 319,235.40/x
  3. Step 3: Cross multiply
    880,403.40x = 1,320,605.10 × 319,235.40
  4. Step 4: Simplify right side
    880,403.40x = 421,583,897,340.54
  5. Step 5: Solve for x
    x = 421,583,897,340.54/880,403.40
  6. Step 6: Final answer
    x = 478,853.10

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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.