Home / 738,179.90-1,018,688.28-398,648.15

Finding the Fourth Proportional to 738,179.90, 1,018,688.28 and 398,648.15

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Solution

The fourth proportional to 738,179.90, 1,018,688.28 and 398,648.15 is: 550,134.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,179.90 : 1,018,688.28 = 398,648.15 : x
  2. Step 2: Convert to fraction form
    738,179.90/1,018,688.28 = 398,648.15/x
  3. Step 3: Cross multiply
    738,179.90x = 1,018,688.28 × 398,648.15
  4. Step 4: Simplify right side
    738,179.90x = 406,098,201,210.51
  5. Step 5: Solve for x
    x = 406,098,201,210.51/738,179.90
  6. Step 6: Final answer
    x = 550,134.46

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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.