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Finding the Fourth Proportional to 665,797.89, 918,542.93 and 424,037.19

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Solution

The fourth proportional to 665,797.89, 918,542.93 and 424,037.19 is: 585,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,797.89 : 918,542.93 = 424,037.19 : x
  2. Step 2: Convert to fraction form
    665,797.89/918,542.93 = 424,037.19/x
  3. Step 3: Cross multiply
    665,797.89x = 918,542.93 × 424,037.19
  4. Step 4: Simplify right side
    665,797.89x = 389,496,360,811.38
  5. Step 5: Solve for x
    x = 389,496,360,811.38/665,797.89
  6. Step 6: Final answer
    x = 585,006.90

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Double scale
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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.