Home / 646,124,656.80-969,186,985.20-391,320,688.80

Finding the Fourth Proportional to 646,124,656.80, 969,186,985.20 and 391,320,688.80

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Solution

The fourth proportional to 646,124,656.80, 969,186,985.20 and 391,320,688.80 is: 586,981,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,124,656.80 : 969,186,985.20 = 391,320,688.80 : x
  2. Step 2: Convert to fraction form
    646,124,656.80/969,186,985.20 = 391,320,688.80/x
  3. Step 3: Cross multiply
    646,124,656.80x = 969,186,985.20 × 391,320,688.80
  4. Step 4: Simplify right side
    646,124,656.80x = 379,262,918,624,459,456
  5. Step 5: Solve for x
    x = 379,262,918,624,459,456/646,124,656.80
  6. Step 6: Final answer
    x = 586,981,033.20

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Double scale
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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.