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Finding the Fourth Proportional to 1,078,835.64, 1,488,742.72 and 619,627.20

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Solution

The fourth proportional to 1,078,835.64, 1,488,742.72 and 619,627.20 is: 855,056.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,835.64 : 1,488,742.72 = 619,627.20 : x
  2. Step 2: Convert to fraction form
    1,078,835.64/1,488,742.72 = 619,627.20/x
  3. Step 3: Cross multiply
    1,078,835.64x = 1,488,742.72 × 619,627.20
  4. Step 4: Simplify right side
    1,078,835.64x = 922,465,483,113.98
  5. Step 5: Solve for x
    x = 922,465,483,113.98/1,078,835.64
  6. Step 6: Final answer
    x = 855,056.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.