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Finding the Fourth Proportional to 611,862.15, 917,793.23 and 521,320.35

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Solution

The fourth proportional to 611,862.15, 917,793.23 and 521,320.35 is: 781,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,862.15 : 917,793.23 = 521,320.35 : x
  2. Step 2: Convert to fraction form
    611,862.15/917,793.23 = 521,320.35/x
  3. Step 3: Cross multiply
    611,862.15x = 917,793.23 × 521,320.35
  4. Step 4: Simplify right side
    611,862.15x = 478,464,285,284.63
  5. Step 5: Solve for x
    x = 478,464,285,284.63/611,862.15
  6. Step 6: Final answer
    x = 781,980.53

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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.