Home / 1,390,881.60-2,087,704.80-681,710.40

Finding the Fourth Proportional to 1,390,881.60, 2,087,704.80 and 681,710.40

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Solution

The fourth proportional to 1,390,881.60, 2,087,704.80 and 681,710.40 is: 1,023,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,881.60 : 2,087,704.80 = 681,710.40 : x
  2. Step 2: Convert to fraction form
    1,390,881.60/2,087,704.80 = 681,710.40/x
  3. Step 3: Cross multiply
    1,390,881.60x = 2,087,704.80 × 681,710.40
  4. Step 4: Simplify right side
    1,390,881.60x = 1,423,210,074,289.92
  5. Step 5: Solve for x
    x = 1,423,210,074,289.92/1,390,881.60
  6. Step 6: Final answer
    x = 1,023,243.15

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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.