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Finding the Fourth Proportional to 610,830.40, 918,213.90 and 434,558.20

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Solution

The fourth proportional to 610,830.40, 918,213.90 and 434,558.20 is: 653,237.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,830.40 : 918,213.90 = 434,558.20 : x
  2. Step 2: Convert to fraction form
    610,830.40/918,213.90 = 434,558.20/x
  3. Step 3: Cross multiply
    610,830.40x = 918,213.90 × 434,558.20
  4. Step 4: Simplify right side
    610,830.40x = 399,017,379,598.98
  5. Step 5: Solve for x
    x = 399,017,379,598.98/610,830.40
  6. Step 6: Final answer
    x = 653,237.59

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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.