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Finding the Fourth Proportional to 691,855.29, 954,758.75 and 390,047.13

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Solution

The fourth proportional to 691,855.29, 954,758.75 and 390,047.13 is: 538,264.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,855.29 : 954,758.75 = 390,047.13 : x
  2. Step 2: Convert to fraction form
    691,855.29/954,758.75 = 390,047.13/x
  3. Step 3: Cross multiply
    691,855.29x = 954,758.75 × 390,047.13
  4. Step 4: Simplify right side
    691,855.29x = 372,400,908,329.65
  5. Step 5: Solve for x
    x = 372,400,908,329.65/691,855.29
  6. Step 6: Final answer
    x = 538,264.16

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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.