Home / 810,879.60-1,216,319.40-512,281.20

Finding the Fourth Proportional to 810,879.60, 1,216,319.40 and 512,281.20

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Solution

The fourth proportional to 810,879.60, 1,216,319.40 and 512,281.20 is: 768,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,879.60 : 1,216,319.40 = 512,281.20 : x
  2. Step 2: Convert to fraction form
    810,879.60/1,216,319.40 = 512,281.20/x
  3. Step 3: Cross multiply
    810,879.60x = 1,216,319.40 × 512,281.20
  4. Step 4: Simplify right side
    810,879.60x = 623,097,561,815.28
  5. Step 5: Solve for x
    x = 623,097,561,815.28/810,879.60
  6. Step 6: Final answer
    x = 768,421.80

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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.