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Finding the Fourth Proportional to 660,498.40, 988,123.20 and 572,726.80

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Solution

The fourth proportional to 660,498.40, 988,123.20 and 572,726.80 is: 856,814.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,498.40 : 988,123.20 = 572,726.80 : x
  2. Step 2: Convert to fraction form
    660,498.40/988,123.20 = 572,726.80/x
  3. Step 3: Cross multiply
    660,498.40x = 988,123.20 × 572,726.80
  4. Step 4: Simplify right side
    660,498.40x = 565,924,638,341.76
  5. Step 5: Solve for x
    x = 565,924,638,341.76/660,498.40
  6. Step 6: Final answer
    x = 856,814.55

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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.