Home / 451,674.42-621,746.28-390,392.70

Finding the Fourth Proportional to 451,674.42, 621,746.28 and 390,392.70

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Solution

The fourth proportional to 451,674.42, 621,746.28 and 390,392.70 is: 537,389.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,674.42 : 621,746.28 = 390,392.70 : x
  2. Step 2: Convert to fraction form
    451,674.42/621,746.28 = 390,392.70/x
  3. Step 3: Cross multiply
    451,674.42x = 621,746.28 × 390,392.70
  4. Step 4: Simplify right side
    451,674.42x = 242,725,208,964.16
  5. Step 5: Solve for x
    x = 242,725,208,964.16/451,674.42
  6. Step 6: Final answer
    x = 537,389.76

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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.