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Finding the Fourth Proportional to 640,012.40, 960,018.60 and 463,756.40

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Solution

The fourth proportional to 640,012.40, 960,018.60 and 463,756.40 is: 695,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,012.40 : 960,018.60 = 463,756.40 : x
  2. Step 2: Convert to fraction form
    640,012.40/960,018.60 = 463,756.40/x
  3. Step 3: Cross multiply
    640,012.40x = 960,018.60 × 463,756.40
  4. Step 4: Simplify right side
    640,012.40x = 445,214,769,869.04
  5. Step 5: Solve for x
    x = 445,214,769,869.04/640,012.40
  6. Step 6: Final answer
    x = 695,634.60

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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.