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Finding the Fourth Proportional to 674,752.06, 931,158.75 and 388,266.40

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Solution

The fourth proportional to 674,752.06, 931,158.75 and 388,266.40 is: 535,808.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,752.06 : 931,158.75 = 388,266.40 : x
  2. Step 2: Convert to fraction form
    674,752.06/931,158.75 = 388,266.40/x
  3. Step 3: Cross multiply
    674,752.06x = 931,158.75 × 388,266.40
  4. Step 4: Simplify right side
    674,752.06x = 361,537,655,691
  5. Step 5: Solve for x
    x = 361,537,655,691/674,752.06
  6. Step 6: Final answer
    x = 535,808.15

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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.