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Finding the Fourth Proportional to 421,523.20, 630,972.60 and 243,501.40

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Solution

The fourth proportional to 421,523.20, 630,972.60 and 243,501.40 is: 364,494.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,523.20 : 630,972.60 = 243,501.40 : x
  2. Step 2: Convert to fraction form
    421,523.20/630,972.60 = 243,501.40/x
  3. Step 3: Cross multiply
    421,523.20x = 630,972.60 × 243,501.40
  4. Step 4: Simplify right side
    421,523.20x = 153,642,711,461.64
  5. Step 5: Solve for x
    x = 153,642,711,461.64/421,523.20
  6. Step 6: Final answer
    x = 364,494.08

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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.