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Finding the Fourth Proportional to 610,842.40, 918,231.90 and 434,570.20

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Solution

The fourth proportional to 610,842.40, 918,231.90 and 434,570.20 is: 653,255.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,842.40 : 918,231.90 = 434,570.20 : x
  2. Step 2: Convert to fraction form
    610,842.40/918,231.90 = 434,570.20/x
  3. Step 3: Cross multiply
    610,842.40x = 918,231.90 × 434,570.20
  4. Step 4: Simplify right side
    610,842.40x = 399,036,220,429.38
  5. Step 5: Solve for x
    x = 399,036,220,429.38/610,842.40
  6. Step 6: Final answer
    x = 653,255.60

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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.