Home / 1,490,438.40-2,237,140.80-691,900.80

Finding the Fourth Proportional to 1,490,438.40, 2,237,140.80 and 691,900.80

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Solution

The fourth proportional to 1,490,438.40, 2,237,140.80 and 691,900.80 is: 1,038,539.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490,438.40 : 2,237,140.80 = 691,900.80 : x
  2. Step 2: Convert to fraction form
    1,490,438.40/2,237,140.80 = 691,900.80/x
  3. Step 3: Cross multiply
    1,490,438.40x = 2,237,140.80 × 691,900.80
  4. Step 4: Simplify right side
    1,490,438.40x = 1,547,879,509,232.64
  5. Step 5: Solve for x
    x = 1,547,879,509,232.64/1,490,438.40
  6. Step 6: Final answer
    x = 1,038,539.74

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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.