Home / 851,291.80-1,276,289.70-430,869.40

Finding the Fourth Proportional to 851,291.80, 1,276,289.70 and 430,869.40

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Solution

The fourth proportional to 851,291.80, 1,276,289.70 and 430,869.40 is: 645,976.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,291.80 : 1,276,289.70 = 430,869.40 : x
  2. Step 2: Convert to fraction form
    851,291.80/1,276,289.70 = 430,869.40/x
  3. Step 3: Cross multiply
    851,291.80x = 1,276,289.70 × 430,869.40
  4. Step 4: Simplify right side
    851,291.80x = 549,914,177,265.18
  5. Step 5: Solve for x
    x = 549,914,177,265.18/851,291.80
  6. Step 6: Final answer
    x = 645,976.12

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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.