Home / 420,193,643.40-630,290,465.10-414,454,080.60

Finding the Fourth Proportional to 420,193,643.40, 630,290,465.10 and 414,454,080.60

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Solution

The fourth proportional to 420,193,643.40, 630,290,465.10 and 414,454,080.60 is: 621,681,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,193,643.40 : 630,290,465.10 = 414,454,080.60 : x
  2. Step 2: Convert to fraction form
    420,193,643.40/630,290,465.10 = 414,454,080.60/x
  3. Step 3: Cross multiply
    420,193,643.40x = 630,290,465.10 × 414,454,080.60
  4. Step 4: Simplify right side
    420,193,643.40x = 261,226,455,223,966,912
  5. Step 5: Solve for x
    x = 261,226,455,223,966,912/420,193,643.40
  6. Step 6: Final answer
    x = 621,681,120.90

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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.