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Finding the Fourth Proportional to 665,190.04, 917,960.68 and 363,386.20

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Solution

The fourth proportional to 665,190.04, 917,960.68 and 363,386.20 is: 501,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,190.04 : 917,960.68 = 363,386.20 : x
  2. Step 2: Convert to fraction form
    665,190.04/917,960.68 = 363,386.20/x
  3. Step 3: Cross multiply
    665,190.04x = 917,960.68 × 363,386.20
  4. Step 4: Simplify right side
    665,190.04x = 333,574,243,254.62
  5. Step 5: Solve for x
    x = 333,574,243,254.62/665,190.04
  6. Step 6: Final answer
    x = 501,472.10

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.