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Finding the Fourth Proportional to 717,512.34, 990,130.50 and 395,215.50

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Solution

The fourth proportional to 717,512.34, 990,130.50 and 395,215.50 is: 545,377.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,512.34 : 990,130.50 = 395,215.50 : x
  2. Step 2: Convert to fraction form
    717,512.34/990,130.50 = 395,215.50/x
  3. Step 3: Cross multiply
    717,512.34x = 990,130.50 × 395,215.50
  4. Step 4: Simplify right side
    717,512.34x = 391,314,920,622.75
  5. Step 5: Solve for x
    x = 391,314,920,622.75/717,512.34
  6. Step 6: Final answer
    x = 545,377.27

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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.