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Finding the Fourth Proportional to 645,615.70, 968,423.55 and 531,454.30

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Solution

The fourth proportional to 645,615.70, 968,423.55 and 531,454.30 is: 797,181.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,615.70 : 968,423.55 = 531,454.30 : x
  2. Step 2: Convert to fraction form
    645,615.70/968,423.55 = 531,454.30/x
  3. Step 3: Cross multiply
    645,615.70x = 968,423.55 × 531,454.30
  4. Step 4: Simplify right side
    645,615.70x = 514,672,859,868.77
  5. Step 5: Solve for x
    x = 514,672,859,868.77/645,615.70
  6. Step 6: Final answer
    x = 797,181.45

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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.