Home / 678,889.60-1,018,075.20-205,417.60

Finding the Fourth Proportional to 678,889.60, 1,018,075.20 and 205,417.60

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Solution

The fourth proportional to 678,889.60, 1,018,075.20 and 205,417.60 is: 308,047.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,889.60 : 1,018,075.20 = 205,417.60 : x
  2. Step 2: Convert to fraction form
    678,889.60/1,018,075.20 = 205,417.60/x
  3. Step 3: Cross multiply
    678,889.60x = 1,018,075.20 × 205,417.60
  4. Step 4: Simplify right side
    678,889.60x = 209,130,564,203.52
  5. Step 5: Solve for x
    x = 209,130,564,203.52/678,889.60
  6. Step 6: Final answer
    x = 308,047.97

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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.