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Finding the Fourth Proportional to 858,602.40, 1,286,866.80 and 437,661.60

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Solution

The fourth proportional to 858,602.40, 1,286,866.80 and 437,661.60 is: 655,963.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,602.40 : 1,286,866.80 = 437,661.60 : x
  2. Step 2: Convert to fraction form
    858,602.40/1,286,866.80 = 437,661.60/x
  3. Step 3: Cross multiply
    858,602.40x = 1,286,866.80 × 437,661.60
  4. Step 4: Simplify right side
    858,602.40x = 563,212,182,674.88
  5. Step 5: Solve for x
    x = 563,212,182,674.88/858,602.40
  6. Step 6: Final answer
    x = 655,963.90

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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.