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Finding the Fourth Proportional to 611,603.70, 917,405.55 and 587,109.30

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Solution

The fourth proportional to 611,603.70, 917,405.55 and 587,109.30 is: 880,663.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,603.70 : 917,405.55 = 587,109.30 : x
  2. Step 2: Convert to fraction form
    611,603.70/917,405.55 = 587,109.30/x
  3. Step 3: Cross multiply
    611,603.70x = 917,405.55 × 587,109.30
  4. Step 4: Simplify right side
    611,603.70x = 538,617,330,276.62
  5. Step 5: Solve for x
    x = 538,617,330,276.62/611,603.70
  6. Step 6: Final answer
    x = 880,663.95

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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.