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Finding the Fourth Proportional to 623,920.60, 935,880.90 and 308,312.20

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Solution

The fourth proportional to 623,920.60, 935,880.90 and 308,312.20 is: 462,468.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,920.60 : 935,880.90 = 308,312.20 : x
  2. Step 2: Convert to fraction form
    623,920.60/935,880.90 = 308,312.20/x
  3. Step 3: Cross multiply
    623,920.60x = 935,880.90 × 308,312.20
  4. Step 4: Simplify right side
    623,920.60x = 288,543,499,216.98
  5. Step 5: Solve for x
    x = 288,543,499,216.98/623,920.60
  6. Step 6: Final answer
    x = 462,468.30

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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.