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Finding the Fourth Proportional to 525,611.60, 788,417.40 and 420,635.60

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Solution

The fourth proportional to 525,611.60, 788,417.40 and 420,635.60 is: 630,953.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,611.60 : 788,417.40 = 420,635.60 : x
  2. Step 2: Convert to fraction form
    525,611.60/788,417.40 = 420,635.60/x
  3. Step 3: Cross multiply
    525,611.60x = 788,417.40 × 420,635.60
  4. Step 4: Simplify right side
    525,611.60x = 331,636,426,099.44
  5. Step 5: Solve for x
    x = 331,636,426,099.44/525,611.60
  6. Step 6: Final answer
    x = 630,953.40

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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.