Home / 219,308,979.40-328,963,469.10-212,931,687.40

Finding the Fourth Proportional to 219,308,979.40, 328,963,469.10 and 212,931,687.40

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Solution

The fourth proportional to 219,308,979.40, 328,963,469.10 and 212,931,687.40 is: 319,397,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,308,979.40 : 328,963,469.10 = 212,931,687.40 : x
  2. Step 2: Convert to fraction form
    219,308,979.40/328,963,469.10 = 212,931,687.40/x
  3. Step 3: Cross multiply
    219,308,979.40x = 328,963,469.10 × 212,931,687.40
  4. Step 4: Simplify right side
    219,308,979.40x = 70,046,746,568,420,768
  5. Step 5: Solve for x
    x = 70,046,746,568,420,768/219,308,979.40
  6. Step 6: Final answer
    x = 319,397,531.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.