Home / 851,238.80-1,276,210.20-430,816.40

Finding the Fourth Proportional to 851,238.80, 1,276,210.20 and 430,816.40

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Solution

The fourth proportional to 851,238.80, 1,276,210.20 and 430,816.40 is: 645,896.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,238.80 : 1,276,210.20 = 430,816.40 : x
  2. Step 2: Convert to fraction form
    851,238.80/1,276,210.20 = 430,816.40/x
  3. Step 3: Cross multiply
    851,238.80x = 1,276,210.20 × 430,816.40
  4. Step 4: Simplify right side
    851,238.80x = 549,812,284,007.28
  5. Step 5: Solve for x
    x = 549,812,284,007.28/851,238.80
  6. Step 6: Final answer
    x = 645,896.64

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1.5x scale

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.