Home / 651,775.20-977,079.60-427,243.20

Finding the Fourth Proportional to 651,775.20, 977,079.60 and 427,243.20

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Solution

The fourth proportional to 651,775.20, 977,079.60 and 427,243.20 is: 640,482.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,775.20 : 977,079.60 = 427,243.20 : x
  2. Step 2: Convert to fraction form
    651,775.20/977,079.60 = 427,243.20/x
  3. Step 3: Cross multiply
    651,775.20x = 977,079.60 × 427,243.20
  4. Step 4: Simplify right side
    651,775.20x = 417,450,614,958.72
  5. Step 5: Solve for x
    x = 417,450,614,958.72/651,775.20
  6. Step 6: Final answer
    x = 640,482.51

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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.