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Finding the Fourth Proportional to 489,480, 675,864.68 and 317,479.72

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Solution

The fourth proportional to 489,480, 675,864.68 and 317,479.72 is: 438,369.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,480 : 675,864.68 = 317,479.72 : x
  2. Step 2: Convert to fraction form
    489,480/675,864.68 = 317,479.72/x
  3. Step 3: Cross multiply
    489,480x = 675,864.68 × 317,479.72
  4. Step 4: Simplify right side
    489,480x = 214,573,329,364.29
  5. Step 5: Solve for x
    x = 214,573,329,364.29/489,480
  6. Step 6: Final answer
    x = 438,369.96

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1.5x scale

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.