Home / 1,319,051.19-1,978,720.16-420,281.67

Finding the Fourth Proportional to 1,319,051.19, 1,978,720.16 and 420,281.67

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Solution

The fourth proportional to 1,319,051.19, 1,978,720.16 and 420,281.67 is: 630,468.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,051.19 : 1,978,720.16 = 420,281.67 : x
  2. Step 2: Convert to fraction form
    1,319,051.19/1,978,720.16 = 420,281.67/x
  3. Step 3: Cross multiply
    1,319,051.19x = 1,978,720.16 × 420,281.67
  4. Step 4: Simplify right side
    1,319,051.19x = 831,619,813,307.47
  5. Step 5: Solve for x
    x = 831,619,813,307.47/1,319,051.19
  6. Step 6: Final answer
    x = 630,468.19

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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.