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Finding the Fourth Proportional to 670,430.45, 925,061.68 and 376,089.95

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Solution

The fourth proportional to 670,430.45, 925,061.68 and 376,089.95 is: 518,929.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,430.45 : 925,061.68 = 376,089.95 : x
  2. Step 2: Convert to fraction form
    670,430.45/925,061.68 = 376,089.95/x
  3. Step 3: Cross multiply
    670,430.45x = 925,061.68 × 376,089.95
  4. Step 4: Simplify right side
    670,430.45x = 347,906,403,760.88
  5. Step 5: Solve for x
    x = 347,906,403,760.88/670,430.45
  6. Step 6: Final answer
    x = 518,929.89

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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.