Home / 612,512,017,885.80-845,648,053,929.54-389,908,458,628.29

Finding the Fourth Proportional to 612,512,017,885.80, 845,648,053,929.54 and 389,908,458,628.29

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Solution

The fourth proportional to 612,512,017,885.80, 845,648,053,929.54 and 389,908,458,628.29 is: 538,316,505,834.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,512,017,885.80 : 845,648,053,929.54 = 389,908,458,628.29 : x
  2. Step 2: Convert to fraction form
    612,512,017,885.80/845,648,053,929.54 = 389,908,458,628.29/x
  3. Step 3: Cross multiply
    612,512,017,885.80x = 845,648,053,929.54 × 389,908,458,628.29
  4. Step 4: Simplify right side
    612,512,017,885.80x = 329,725,329,249,679,989,276,672
  5. Step 5: Solve for x
    x = 329,725,329,249,679,989,276,672/612,512,017,885.80
  6. Step 6: Final answer
    x = 538,316,505,834.10

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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.