Home / 1,292,912,330.45-1,939,368,521.30-310,338,869.72

Finding the Fourth Proportional to 1,292,912,330.45, 1,939,368,521.30 and 310,338,869.72

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Solution

The fourth proportional to 1,292,912,330.45, 1,939,368,521.30 and 310,338,869.72 is: 465,508,310.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,912,330.45 : 1,939,368,521.30 = 310,338,869.72 : x
  2. Step 2: Convert to fraction form
    1,292,912,330.45/1,939,368,521.30 = 310,338,869.72/x
  3. Step 3: Cross multiply
    1,292,912,330.45x = 1,939,368,521.30 × 310,338,869.72
  4. Step 4: Simplify right side
    1,292,912,330.45x = 601,861,434,872,209,280
  5. Step 5: Solve for x
    x = 601,861,434,872,209,280/1,292,912,330.45
  6. Step 6: Final answer
    x = 465,508,310.73

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Double scale
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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.