Home / 671,870.40-1,005,438.52-419,269.74

Finding the Fourth Proportional to 671,870.40, 1,005,438.52 and 419,269.74

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Solution

The fourth proportional to 671,870.40, 1,005,438.52 and 419,269.74 is: 627,427.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,870.40 : 1,005,438.52 = 419,269.74 : x
  2. Step 2: Convert to fraction form
    671,870.40/1,005,438.52 = 419,269.74/x
  3. Step 3: Cross multiply
    671,870.40x = 1,005,438.52 × 419,269.74
  4. Step 4: Simplify right side
    671,870.40x = 421,549,946,866.39
  5. Step 5: Solve for x
    x = 421,549,946,866.39/671,870.40
  6. Step 6: Final answer
    x = 627,427.47

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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.