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Finding the Fourth Proportional to 656,688.60, 985,032.90 and 420,492.60

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Solution

The fourth proportional to 656,688.60, 985,032.90 and 420,492.60 is: 630,738.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,688.60 : 985,032.90 = 420,492.60 : x
  2. Step 2: Convert to fraction form
    656,688.60/985,032.90 = 420,492.60/x
  3. Step 3: Cross multiply
    656,688.60x = 985,032.90 × 420,492.60
  4. Step 4: Simplify right side
    656,688.60x = 414,199,045,206.54
  5. Step 5: Solve for x
    x = 414,199,045,206.54/656,688.60
  6. Step 6: Final answer
    x = 630,738.90

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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.