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Finding the Fourth Proportional to 620,631.10, 930,946.65 and 408,054.70

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Solution

The fourth proportional to 620,631.10, 930,946.65 and 408,054.70 is: 612,082.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,631.10 : 930,946.65 = 408,054.70 : x
  2. Step 2: Convert to fraction form
    620,631.10/930,946.65 = 408,054.70/x
  3. Step 3: Cross multiply
    620,631.10x = 930,946.65 × 408,054.70
  4. Step 4: Simplify right side
    620,631.10x = 379,877,155,981.76
  5. Step 5: Solve for x
    x = 379,877,155,981.76/620,631.10
  6. Step 6: Final answer
    x = 612,082.05

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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.