Home / 679,023,947.40-1,018,535,921.10-638,847,007.80

Finding the Fourth Proportional to 679,023,947.40, 1,018,535,921.10 and 638,847,007.80

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Solution

The fourth proportional to 679,023,947.40, 1,018,535,921.10 and 638,847,007.80 is: 958,270,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,023,947.40 : 1,018,535,921.10 = 638,847,007.80 : x
  2. Step 2: Convert to fraction form
    679,023,947.40/1,018,535,921.10 = 638,847,007.80/x
  3. Step 3: Cross multiply
    679,023,947.40x = 1,018,535,921.10 × 638,847,007.80
  4. Step 4: Simplify right side
    679,023,947.40x = 650,688,625,531,551,872
  5. Step 5: Solve for x
    x = 650,688,625,531,551,872/679,023,947.40
  6. Step 6: Final answer
    x = 958,270,511.70

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1.5x scale

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.