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Finding the Fourth Proportional to 709,768.90, 979,495.91 and 387,492.58

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Solution

The fourth proportional to 709,768.90, 979,495.91 and 387,492.58 is: 534,747.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,768.90 : 979,495.91 = 387,492.58 : x
  2. Step 2: Convert to fraction form
    709,768.90/979,495.91 = 387,492.58/x
  3. Step 3: Cross multiply
    709,768.90x = 979,495.91 × 387,492.58
  4. Step 4: Simplify right side
    709,768.90x = 379,547,397,265.35
  5. Step 5: Solve for x
    x = 379,547,397,265.35/709,768.90
  6. Step 6: Final answer
    x = 534,747.86

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1.5x scale

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.