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Finding the Fourth Proportional to 421,046.60, 631,569.90 and 243,462.20

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Solution

The fourth proportional to 421,046.60, 631,569.90 and 243,462.20 is: 365,193.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,046.60 : 631,569.90 = 243,462.20 : x
  2. Step 2: Convert to fraction form
    421,046.60/631,569.90 = 243,462.20/x
  3. Step 3: Cross multiply
    421,046.60x = 631,569.90 × 243,462.20
  4. Step 4: Simplify right side
    421,046.60x = 153,763,397,307.78
  5. Step 5: Solve for x
    x = 153,763,397,307.78/421,046.60
  6. Step 6: Final answer
    x = 365,193.30

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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.