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Finding the Fourth Proportional to 660,490.40, 988,111.20 and 572,718.80

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Solution

The fourth proportional to 660,490.40, 988,111.20 and 572,718.80 is: 856,802.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,490.40 : 988,111.20 = 572,718.80 : x
  2. Step 2: Convert to fraction form
    660,490.40/988,111.20 = 572,718.80/x
  3. Step 3: Cross multiply
    660,490.40x = 988,111.20 × 572,718.80
  4. Step 4: Simplify right side
    660,490.40x = 565,909,860,730.56
  5. Step 5: Solve for x
    x = 565,909,860,730.56/660,490.40
  6. Step 6: Final answer
    x = 856,802.55

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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.