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Finding the Fourth Proportional to 459,686.40, 689,529.60 and 354,710.40

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Solution

The fourth proportional to 459,686.40, 689,529.60 and 354,710.40 is: 532,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,686.40 : 689,529.60 = 354,710.40 : x
  2. Step 2: Convert to fraction form
    459,686.40/689,529.60 = 354,710.40/x
  3. Step 3: Cross multiply
    459,686.40x = 689,529.60 × 354,710.40
  4. Step 4: Simplify right side
    459,686.40x = 244,583,320,227.84
  5. Step 5: Solve for x
    x = 244,583,320,227.84/459,686.40
  6. Step 6: Final answer
    x = 532,065.60

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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.