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Finding the Fourth Proportional to 669,806.84, 924,312.10 and 383,320.78

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Solution

The fourth proportional to 669,806.84, 924,312.10 and 383,320.78 is: 528,970.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,806.84 : 924,312.10 = 383,320.78 : x
  2. Step 2: Convert to fraction form
    669,806.84/924,312.10 = 383,320.78/x
  3. Step 3: Cross multiply
    669,806.84x = 924,312.10 × 383,320.78
  4. Step 4: Simplify right side
    669,806.84x = 354,308,035,135.44
  5. Step 5: Solve for x
    x = 354,308,035,135.44/669,806.84
  6. Step 6: Final answer
    x = 528,970.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.