Home / 451,681.35-621,755.46-390,399.45

Finding the Fourth Proportional to 451,681.35, 621,755.46 and 390,399.45

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Solution

The fourth proportional to 451,681.35, 621,755.46 and 390,399.45 is: 537,398.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,681.35 : 621,755.46 = 390,399.45 : x
  2. Step 2: Convert to fraction form
    451,681.35/621,755.46 = 390,399.45/x
  3. Step 3: Cross multiply
    451,681.35x = 621,755.46 × 390,399.45
  4. Step 4: Simplify right side
    451,681.35x = 242,732,989,618.50
  5. Step 5: Solve for x
    x = 242,732,989,618.50/451,681.35
  6. Step 6: Final answer
    x = 537,398.74

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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.