Home / 738,178.98-1,018,686.96-398,647.20

Finding the Fourth Proportional to 738,178.98, 1,018,686.96 and 398,647.20

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Solution

The fourth proportional to 738,178.98, 1,018,686.96 and 398,647.20 is: 550,133.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,178.98 : 1,018,686.96 = 398,647.20 : x
  2. Step 2: Convert to fraction form
    738,178.98/1,018,686.96 = 398,647.20/x
  3. Step 3: Cross multiply
    738,178.98x = 1,018,686.96 × 398,647.20
  4. Step 4: Simplify right side
    738,178.98x = 406,096,704,280.51
  5. Step 5: Solve for x
    x = 406,096,704,280.51/738,178.98
  6. Step 6: Final answer
    x = 550,133.12

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.