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Finding the Fourth Proportional to 714,868.84, 985,972.35 and 485,602.90

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Solution

The fourth proportional to 714,868.84, 985,972.35 and 485,602.90 is: 669,760.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,868.84 : 985,972.35 = 485,602.90 : x
  2. Step 2: Convert to fraction form
    714,868.84/985,972.35 = 485,602.90/x
  3. Step 3: Cross multiply
    714,868.84x = 985,972.35 × 485,602.90
  4. Step 4: Simplify right side
    714,868.84x = 478,791,032,479.82
  5. Step 5: Solve for x
    x = 478,791,032,479.82/714,868.84
  6. Step 6: Final answer
    x = 669,760.67

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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.