Home / 451,671.48-621,742.08-390,389.76

Finding the Fourth Proportional to 451,671.48, 621,742.08 and 390,389.76

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Solution

The fourth proportional to 451,671.48, 621,742.08 and 390,389.76 is: 537,385.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,671.48 : 621,742.08 = 390,389.76 : x
  2. Step 2: Convert to fraction form
    451,671.48/621,742.08 = 390,389.76/x
  3. Step 3: Cross multiply
    451,671.48x = 621,742.08 × 390,389.76
  4. Step 4: Simplify right side
    451,671.48x = 242,721,741,393.10
  5. Step 5: Solve for x
    x = 242,721,741,393.10/451,671.48
  6. Step 6: Final answer
    x = 537,385.58

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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.