Home / 651,029.60-976,544.40-427,080.80

Finding the Fourth Proportional to 651,029.60, 976,544.40 and 427,080.80

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Solution

The fourth proportional to 651,029.60, 976,544.40 and 427,080.80 is: 640,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,029.60 : 976,544.40 = 427,080.80 : x
  2. Step 2: Convert to fraction form
    651,029.60/976,544.40 = 427,080.80/x
  3. Step 3: Cross multiply
    651,029.60x = 976,544.40 × 427,080.80
  4. Step 4: Simplify right side
    651,029.60x = 417,063,363,587.52
  5. Step 5: Solve for x
    x = 417,063,363,587.52/651,029.60
  6. Step 6: Final answer
    x = 640,621.20

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Double scale
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Similar ratio
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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.