Home / 431,153,117.80-646,824,155.10-212,908,013.80

Finding the Fourth Proportional to 431,153,117.80, 646,824,155.10 and 212,908,013.80

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Solution

The fourth proportional to 431,153,117.80, 646,824,155.10 and 212,908,013.80 is: 319,408,675.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,153,117.80 : 646,824,155.10 = 212,908,013.80 : x
  2. Step 2: Convert to fraction form
    431,153,117.80/646,824,155.10 = 212,908,013.80/x
  3. Step 3: Cross multiply
    431,153,117.80x = 646,824,155.10 × 212,908,013.80
  4. Step 4: Simplify right side
    431,153,117.80x = 137,714,046,140,204,160
  5. Step 5: Solve for x
    x = 137,714,046,140,204,160/431,153,117.80
  6. Step 6: Final answer
    x = 319,408,675.14

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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.