Home / 448,017,430.40-672,026,145.60-420,807,651.20

Finding the Fourth Proportional to 448,017,430.40, 672,026,145.60 and 420,807,651.20

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Solution

The fourth proportional to 448,017,430.40, 672,026,145.60 and 420,807,651.20 is: 631,211,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,017,430.40 : 672,026,145.60 = 420,807,651.20 : x
  2. Step 2: Convert to fraction form
    448,017,430.40/672,026,145.60 = 420,807,651.20/x
  3. Step 3: Cross multiply
    448,017,430.40x = 672,026,145.60 × 420,807,651.20
  4. Step 4: Simplify right side
    448,017,430.40x = 282,793,743,874,925,216
  5. Step 5: Solve for x
    x = 282,793,743,874,925,216/448,017,430.40
  6. Step 6: Final answer
    x = 631,211,476.80

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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.