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Finding the Fourth Proportional to 919,472,856.20, 1,379,881,130.70 and 647,375,064.20

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Solution

The fourth proportional to 919,472,856.20, 1,379,881,130.70 and 647,375,064.20 is: 971,535,624.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,472,856.20 : 1,379,881,130.70 = 647,375,064.20 : x
  2. Step 2: Convert to fraction form
    919,472,856.20/1,379,881,130.70 = 647,375,064.20/x
  3. Step 3: Cross multiply
    919,472,856.20x = 1,379,881,130.70 × 647,375,064.20
  4. Step 4: Simplify right side
    919,472,856.20x = 893,300,635,575,281,152
  5. Step 5: Solve for x
    x = 893,300,635,575,281,152/919,472,856.20
  6. Step 6: Final answer
    x = 971,535,624.52

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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.