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Finding the Fourth Proportional to 605,621.70, 907,411.95 and 478,775.70

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Solution

The fourth proportional to 605,621.70, 907,411.95 and 478,775.70 is: 717,356.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,621.70 : 907,411.95 = 478,775.70 : x
  2. Step 2: Convert to fraction form
    605,621.70/907,411.95 = 478,775.70/x
  3. Step 3: Cross multiply
    605,621.70x = 907,411.95 × 478,775.70
  4. Step 4: Simplify right side
    605,621.70x = 434,446,791,549.62
  5. Step 5: Solve for x
    x = 434,446,791,549.62/605,621.70
  6. Step 6: Final answer
    x = 717,356.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.