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Finding the Fourth Proportional to 611,862.40, 917,793.60 and 521,320.60

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Solution

The fourth proportional to 611,862.40, 917,793.60 and 521,320.60 is: 781,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,862.40 : 917,793.60 = 521,320.60 : x
  2. Step 2: Convert to fraction form
    611,862.40/917,793.60 = 521,320.60/x
  3. Step 3: Cross multiply
    611,862.40x = 917,793.60 × 521,320.60
  4. Step 4: Simplify right side
    611,862.40x = 478,464,710,228.16
  5. Step 5: Solve for x
    x = 478,464,710,228.16/611,862.40
  6. Step 6: Final answer
    x = 781,980.90

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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.