Home / 858,499.40-1,287,749.10-543,312.20

Finding the Fourth Proportional to 858,499.40, 1,287,749.10 and 543,312.20

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Solution

The fourth proportional to 858,499.40, 1,287,749.10 and 543,312.20 is: 814,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,499.40 : 1,287,749.10 = 543,312.20 : x
  2. Step 2: Convert to fraction form
    858,499.40/1,287,749.10 = 543,312.20/x
  3. Step 3: Cross multiply
    858,499.40x = 1,287,749.10 × 543,312.20
  4. Step 4: Simplify right side
    858,499.40x = 699,649,796,569.02
  5. Step 5: Solve for x
    x = 699,649,796,569.02/858,499.40
  6. Step 6: Final answer
    x = 814,968.30

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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.