Home / 679,480.40-1,018,529.40-398,853.20

Finding the Fourth Proportional to 679,480.40, 1,018,529.40 and 398,853.20

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Solution

The fourth proportional to 679,480.40, 1,018,529.40 and 398,853.20 is: 597,874.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,480.40 : 1,018,529.40 = 398,853.20 : x
  2. Step 2: Convert to fraction form
    679,480.40/1,018,529.40 = 398,853.20/x
  3. Step 3: Cross multiply
    679,480.40x = 1,018,529.40 × 398,853.20
  4. Step 4: Simplify right side
    679,480.40x = 406,243,710,484.08
  5. Step 5: Solve for x
    x = 406,243,710,484.08/679,480.40
  6. Step 6: Final answer
    x = 597,874.07

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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.