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Finding the Fourth Proportional to 675,234.47, 931,720.07 and 388,699.19

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Solution

The fourth proportional to 675,234.47, 931,720.07 and 388,699.19 is: 536,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,234.47 : 931,720.07 = 388,699.19 : x
  2. Step 2: Convert to fraction form
    675,234.47/931,720.07 = 388,699.19/x
  3. Step 3: Cross multiply
    675,234.47x = 931,720.07 × 388,699.19
  4. Step 4: Simplify right side
    675,234.47x = 362,158,829,913.65
  5. Step 5: Solve for x
    x = 362,158,829,913.65/675,234.47
  6. Step 6: Final answer
    x = 536,345.30

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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.