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Finding the Fourth Proportional to 609,061.79, 840,312.05 and 354,363.77

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Solution

The fourth proportional to 609,061.79, 840,312.05 and 354,363.77 is: 488,909.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,061.79 : 840,312.05 = 354,363.77 : x
  2. Step 2: Convert to fraction form
    609,061.79/840,312.05 = 354,363.77/x
  3. Step 3: Cross multiply
    609,061.79x = 840,312.05 × 354,363.77
  4. Step 4: Simplify right side
    609,061.79x = 297,776,146,014.43
  5. Step 5: Solve for x
    x = 297,776,146,014.43/609,061.79
  6. Step 6: Final answer
    x = 488,909.58

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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.