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Finding the Fourth Proportional to 859,661.80, 1,289,492.70 and 556,543.60

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Solution

The fourth proportional to 859,661.80, 1,289,492.70 and 556,543.60 is: 834,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,661.80 : 1,289,492.70 = 556,543.60 : x
  2. Step 2: Convert to fraction form
    859,661.80/1,289,492.70 = 556,543.60/x
  3. Step 3: Cross multiply
    859,661.80x = 1,289,492.70 × 556,543.60
  4. Step 4: Simplify right side
    859,661.80x = 717,658,909,431.72
  5. Step 5: Solve for x
    x = 717,658,909,431.72/859,661.80
  6. Step 6: Final answer
    x = 834,815.40

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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.