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Finding the Fourth Proportional to 675,421.02, 931,989.70 and 385,070.04

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Solution

The fourth proportional to 675,421.02, 931,989.70 and 385,070.04 is: 531,344.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,421.02 : 931,989.70 = 385,070.04 : x
  2. Step 2: Convert to fraction form
    675,421.02/931,989.70 = 385,070.04/x
  3. Step 3: Cross multiply
    675,421.02x = 931,989.70 × 385,070.04
  4. Step 4: Simplify right side
    675,421.02x = 358,881,311,058.59
  5. Step 5: Solve for x
    x = 358,881,311,058.59/675,421.02
  6. Step 6: Final answer
    x = 531,344.60

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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.