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Finding the Fourth Proportional to 459,744.80, 689,617.20 and 426,567.20

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Solution

The fourth proportional to 459,744.80, 689,617.20 and 426,567.20 is: 639,850.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,744.80 : 689,617.20 = 426,567.20 : x
  2. Step 2: Convert to fraction form
    459,744.80/689,617.20 = 426,567.20/x
  3. Step 3: Cross multiply
    459,744.80x = 689,617.20 × 426,567.20
  4. Step 4: Simplify right side
    459,744.80x = 294,168,078,075.84
  5. Step 5: Solve for x
    x = 294,168,078,075.84/459,744.80
  6. Step 6: Final answer
    x = 639,850.80

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Similar ratio
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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.