Home / 289,036,649.12-398,871,014.10-156,877,693.88

Finding the Fourth Proportional to 289,036,649.12, 398,871,014.10 and 156,877,693.88

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Solution

The fourth proportional to 289,036,649.12, 398,871,014.10 and 156,877,693.88 is: 216,491,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,036,649.12 : 398,871,014.10 = 156,877,693.88 : x
  2. Step 2: Convert to fraction form
    289,036,649.12/398,871,014.10 = 156,877,693.88/x
  3. Step 3: Cross multiply
    289,036,649.12x = 398,871,014.10 × 156,877,693.88
  4. Step 4: Simplify right side
    289,036,649.12x = 62,573,964,847,584,968
  5. Step 5: Solve for x
    x = 62,573,964,847,584,968/289,036,649.12
  6. Step 6: Final answer
    x = 216,491,455.45

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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.