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Finding the Fourth Proportional to 459,562.40, 689,905.20 and 260,021.60

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Solution

The fourth proportional to 459,562.40, 689,905.20 and 260,021.60 is: 390,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,562.40 : 689,905.20 = 260,021.60 : x
  2. Step 2: Convert to fraction form
    459,562.40/689,905.20 = 260,021.60/x
  3. Step 3: Cross multiply
    459,562.40x = 689,905.20 × 260,021.60
  4. Step 4: Simplify right side
    459,562.40x = 179,390,253,952.32
  5. Step 5: Solve for x
    x = 179,390,253,952.32/459,562.40
  6. Step 6: Final answer
    x = 390,350.15

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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.