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Finding the Fourth Proportional to 879,658.40, 1,319,487.60 and 655,709.60

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Solution

The fourth proportional to 879,658.40, 1,319,487.60 and 655,709.60 is: 983,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,658.40 : 1,319,487.60 = 655,709.60 : x
  2. Step 2: Convert to fraction form
    879,658.40/1,319,487.60 = 655,709.60/x
  3. Step 3: Cross multiply
    879,658.40x = 1,319,487.60 × 655,709.60
  4. Step 4: Simplify right side
    879,658.40x = 865,200,686,400.96
  5. Step 5: Solve for x
    x = 865,200,686,400.96/879,658.40
  6. Step 6: Final answer
    x = 983,564.40

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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.