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Finding the Fourth Proportional to 525,789.20, 788,683.80 and 521,123.60

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Solution

The fourth proportional to 525,789.20, 788,683.80 and 521,123.60 is: 781,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,789.20 : 788,683.80 = 521,123.60 : x
  2. Step 2: Convert to fraction form
    525,789.20/788,683.80 = 521,123.60/x
  3. Step 3: Cross multiply
    525,789.20x = 788,683.80 × 521,123.60
  4. Step 4: Simplify right side
    525,789.20x = 411,001,741,117.68
  5. Step 5: Solve for x
    x = 411,001,741,117.68/525,789.20
  6. Step 6: Final answer
    x = 781,685.40

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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.