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Finding the Fourth Proportional to 420,951.60, 631,427.40 and 243,367.20

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Solution

The fourth proportional to 420,951.60, 631,427.40 and 243,367.20 is: 365,050.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,951.60 : 631,427.40 = 243,367.20 : x
  2. Step 2: Convert to fraction form
    420,951.60/631,427.40 = 243,367.20/x
  3. Step 3: Cross multiply
    420,951.60x = 631,427.40 × 243,367.20
  4. Step 4: Simplify right side
    420,951.60x = 153,668,718,341.28
  5. Step 5: Solve for x
    x = 153,668,718,341.28/420,951.60
  6. Step 6: Final answer
    x = 365,050.80

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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.