Home / 385,408,857.60-577,921,996.80-139,755,686.40

Finding the Fourth Proportional to 385,408,857.60, 577,921,996.80 and 139,755,686.40

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Solution

The fourth proportional to 385,408,857.60, 577,921,996.80 and 139,755,686.40 is: 209,564,164.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,408,857.60 : 577,921,996.80 = 139,755,686.40 : x
  2. Step 2: Convert to fraction form
    385,408,857.60/577,921,996.80 = 139,755,686.40/x
  3. Step 3: Cross multiply
    385,408,857.60x = 577,921,996.80 × 139,755,686.40
  4. Step 4: Simplify right side
    385,408,857.60x = 80,767,885,348,442,608
  5. Step 5: Solve for x
    x = 80,767,885,348,442,608/385,408,857.60
  6. Step 6: Final answer
    x = 209,564,164.80

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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.