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Finding the Fourth Proportional to 645,513.40, 968,270.10 and 329,865.40

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Solution

The fourth proportional to 645,513.40, 968,270.10 and 329,865.40 is: 494,798.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,513.40 : 968,270.10 = 329,865.40 : x
  2. Step 2: Convert to fraction form
    645,513.40/968,270.10 = 329,865.40/x
  3. Step 3: Cross multiply
    645,513.40x = 968,270.10 × 329,865.40
  4. Step 4: Simplify right side
    645,513.40x = 319,398,803,844.54
  5. Step 5: Solve for x
    x = 319,398,803,844.54/645,513.40
  6. Step 6: Final answer
    x = 494,798.10

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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.