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Finding the Fourth Proportional to 606,965.40, 910,448.10 and 407,899.80

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Solution

The fourth proportional to 606,965.40, 910,448.10 and 407,899.80 is: 611,849.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,965.40 : 910,448.10 = 407,899.80 : x
  2. Step 2: Convert to fraction form
    606,965.40/910,448.10 = 407,899.80/x
  3. Step 3: Cross multiply
    606,965.40x = 910,448.10 × 407,899.80
  4. Step 4: Simplify right side
    606,965.40x = 371,371,597,900.38
  5. Step 5: Solve for x
    x = 371,371,597,900.38/606,965.40
  6. Step 6: Final answer
    x = 611,849.70

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Half scale
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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.