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Finding the Fourth Proportional to 655,903.20, 905,487.60 and 442,166.88

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Solution

The fourth proportional to 655,903.20, 905,487.60 and 442,166.88 is: 610,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,903.20 : 905,487.60 = 442,166.88 : x
  2. Step 2: Convert to fraction form
    655,903.20/905,487.60 = 442,166.88/x
  3. Step 3: Cross multiply
    655,903.20x = 905,487.60 × 442,166.88
  4. Step 4: Simplify right side
    655,903.20x = 400,376,626,970.69
  5. Step 5: Solve for x
    x = 400,376,626,970.69/655,903.20
  6. Step 6: Final answer
    x = 610,420.30

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1.5x scale

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.