Home / 451,680.35-621,754.08-390,398.45

Finding the Fourth Proportional to 451,680.35, 621,754.08 and 390,398.45

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Solution

The fourth proportional to 451,680.35, 621,754.08 and 390,398.45 is: 537,397.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,680.35 : 621,754.08 = 390,398.45 : x
  2. Step 2: Convert to fraction form
    451,680.35/621,754.08 = 390,398.45/x
  3. Step 3: Cross multiply
    451,680.35x = 621,754.08 × 390,398.45
  4. Step 4: Simplify right side
    451,680.35x = 242,731,829,113.18
  5. Step 5: Solve for x
    x = 242,731,829,113.18/451,680.35
  6. Step 6: Final answer
    x = 537,397.36

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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.