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Finding the Fourth Proportional to 459,737.80, 689,606.70 and 426,560.20

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Solution

The fourth proportional to 459,737.80, 689,606.70 and 426,560.20 is: 639,840.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,737.80 : 689,606.70 = 426,560.20 : x
  2. Step 2: Convert to fraction form
    459,737.80/689,606.70 = 426,560.20/x
  3. Step 3: Cross multiply
    459,737.80x = 689,606.70 × 426,560.20
  4. Step 4: Simplify right side
    459,737.80x = 294,158,771,873.34
  5. Step 5: Solve for x
    x = 294,158,771,873.34/459,737.80
  6. Step 6: Final answer
    x = 639,840.30

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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.