Home / 431,153,005.80-646,823,987.10-212,907,901.80

Finding the Fourth Proportional to 431,153,005.80, 646,823,987.10 and 212,907,901.80

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Solution

The fourth proportional to 431,153,005.80, 646,823,987.10 and 212,907,901.80 is: 319,408,507.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,153,005.80 : 646,823,987.10 = 212,907,901.80 : x
  2. Step 2: Convert to fraction form
    431,153,005.80/646,823,987.10 = 212,907,901.80/x
  3. Step 3: Cross multiply
    431,153,005.80x = 646,823,987.10 × 212,907,901.80
  4. Step 4: Simplify right side
    431,153,005.80x = 137,713,937,927,371,280
  5. Step 5: Solve for x
    x = 137,713,937,927,371,280/431,153,005.80
  6. Step 6: Final answer
    x = 319,408,507.13

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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.