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Finding the Fourth Proportional to 630,434.80, 945,781.80 and 210,012.40

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Solution

The fourth proportional to 630,434.80, 945,781.80 and 210,012.40 is: 315,061.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,434.80 : 945,781.80 = 210,012.40 : x
  2. Step 2: Convert to fraction form
    630,434.80/945,781.80 = 210,012.40/x
  3. Step 3: Cross multiply
    630,434.80x = 945,781.80 × 210,012.40
  4. Step 4: Simplify right side
    630,434.80x = 198,625,905,694.32
  5. Step 5: Solve for x
    x = 198,625,905,694.32/630,434.80
  6. Step 6: Final answer
    x = 315,061.77

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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.