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Finding the Fourth Proportional to 577,998.60, 866,997.90 and 478,271.40

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Solution

The fourth proportional to 577,998.60, 866,997.90 and 478,271.40 is: 717,407.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,998.60 : 866,997.90 = 478,271.40 : x
  2. Step 2: Convert to fraction form
    577,998.60/866,997.90 = 478,271.40/x
  3. Step 3: Cross multiply
    577,998.60x = 866,997.90 × 478,271.40
  4. Step 4: Simplify right side
    577,998.60x = 414,660,299,430.06
  5. Step 5: Solve for x
    x = 414,660,299,430.06/577,998.60
  6. Step 6: Final answer
    x = 717,407.10

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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.