Home / 678,810.40-1,018,215.60-342,887.20

Finding the Fourth Proportional to 678,810.40, 1,018,215.60 and 342,887.20

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Solution

The fourth proportional to 678,810.40, 1,018,215.60 and 342,887.20 is: 514,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,810.40 : 1,018,215.60 = 342,887.20 : x
  2. Step 2: Convert to fraction form
    678,810.40/1,018,215.60 = 342,887.20/x
  3. Step 3: Cross multiply
    678,810.40x = 1,018,215.60 × 342,887.20
  4. Step 4: Simplify right side
    678,810.40x = 349,133,096,080.32
  5. Step 5: Solve for x
    x = 349,133,096,080.32/678,810.40
  6. Step 6: Final answer
    x = 514,330.80

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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.