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Finding the Fourth Proportional to 645,914.98, 968,970.90 and 330,265.30

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Solution

The fourth proportional to 645,914.98, 968,970.90 and 330,265.30 is: 495,448.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,914.98 : 968,970.90 = 330,265.30 : x
  2. Step 2: Convert to fraction form
    645,914.98/968,970.90 = 330,265.30/x
  3. Step 3: Cross multiply
    645,914.98x = 968,970.90 × 330,265.30
  4. Step 4: Simplify right side
    645,914.98x = 320,017,464,979.77
  5. Step 5: Solve for x
    x = 320,017,464,979.77/645,914.98
  6. Step 6: Final answer
    x = 495,448.28

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Double scale
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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.