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Finding the Fourth Proportional to 919,472,862.20, 1,379,881,139.70 and 647,375,070.20

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Solution

The fourth proportional to 919,472,862.20, 1,379,881,139.70 and 647,375,070.20 is: 971,535,633.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,472,862.20 : 1,379,881,139.70 = 647,375,070.20 : x
  2. Step 2: Convert to fraction form
    919,472,862.20/1,379,881,139.70 = 647,375,070.20/x
  3. Step 3: Cross multiply
    919,472,862.20x = 1,379,881,139.70 × 647,375,070.20
  4. Step 4: Simplify right side
    919,472,862.20x = 893,300,649,680,943,616
  5. Step 5: Solve for x
    x = 893,300,649,680,943,616/919,472,862.20
  6. Step 6: Final answer
    x = 971,535,633.52

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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.