Home / 389,391,772,915.40-537,363,801,736.65-215,779,812,345.09

Finding the Fourth Proportional to 389,391,772,915.40, 537,363,801,736.65 and 215,779,812,345.09

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Solution

The fourth proportional to 389,391,772,915.40, 537,363,801,736.65 and 215,779,812,345.09 is: 297,777,889,429.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,391,772,915.40 : 537,363,801,736.65 = 215,779,812,345.09 : x
  2. Step 2: Convert to fraction form
    389,391,772,915.40/537,363,801,736.65 = 215,779,812,345.09/x
  3. Step 3: Cross multiply
    389,391,772,915.40x = 537,363,801,736.65 × 215,779,812,345.09
  4. Step 4: Simplify right side
    389,391,772,915.40x = 115,952,260,299,778,494,038,016
  5. Step 5: Solve for x
    x = 115,952,260,299,778,494,038,016/389,391,772,915.40
  6. Step 6: Final answer
    x = 297,777,889,429.04

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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.