Home / 1,288,119,140.28-1,931,948,681.58-342,722,660.40

Finding the Fourth Proportional to 1,288,119,140.28, 1,931,948,681.58 and 342,722,660.40

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Solution

The fourth proportional to 1,288,119,140.28, 1,931,948,681.58 and 342,722,660.40 is: 514,022,788.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,119,140.28 : 1,931,948,681.58 = 342,722,660.40 : x
  2. Step 2: Convert to fraction form
    1,288,119,140.28/1,931,948,681.58 = 342,722,660.40/x
  3. Step 3: Cross multiply
    1,288,119,140.28x = 1,931,948,681.58 × 342,722,660.40
  4. Step 4: Simplify right side
    1,288,119,140.28x = 662,122,591,907,369,984
  5. Step 5: Solve for x
    x = 662,122,591,907,369,984/1,288,119,140.28
  6. Step 6: Final answer
    x = 514,022,788.11

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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.