Home / 851,285.80-1,276,280.70-430,863.40

Finding the Fourth Proportional to 851,285.80, 1,276,280.70 and 430,863.40

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Solution

The fourth proportional to 851,285.80, 1,276,280.70 and 430,863.40 is: 645,967.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,285.80 : 1,276,280.70 = 430,863.40 : x
  2. Step 2: Convert to fraction form
    851,285.80/1,276,280.70 = 430,863.40/x
  3. Step 3: Cross multiply
    851,285.80x = 1,276,280.70 × 430,863.40
  4. Step 4: Simplify right side
    851,285.80x = 549,902,641,756.38
  5. Step 5: Solve for x
    x = 549,902,641,756.38/851,285.80
  6. Step 6: Final answer
    x = 645,967.13

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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.