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Finding the Fourth Proportional to 992,605.40, 1,488,908.10 and 768,656.60

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Solution

The fourth proportional to 992,605.40, 1,488,908.10 and 768,656.60 is: 1,152,984.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,605.40 : 1,488,908.10 = 768,656.60 : x
  2. Step 2: Convert to fraction form
    992,605.40/1,488,908.10 = 768,656.60/x
  3. Step 3: Cross multiply
    992,605.40x = 1,488,908.10 × 768,656.60
  4. Step 4: Simplify right side
    992,605.40x = 1,144,459,037,858.46
  5. Step 5: Solve for x
    x = 1,144,459,037,858.46/992,605.40
  6. Step 6: Final answer
    x = 1,152,984.90

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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.