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Finding the Fourth Proportional to 611,317.65, 915,783.60 and 400,315.89

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Solution

The fourth proportional to 611,317.65, 915,783.60 and 400,315.89 is: 599,692.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,317.65 : 915,783.60 = 400,315.89 : x
  2. Step 2: Convert to fraction form
    611,317.65/915,783.60 = 400,315.89/x
  3. Step 3: Cross multiply
    611,317.65x = 915,783.60 × 400,315.89
  4. Step 4: Simplify right side
    611,317.65x = 366,602,726,881.40
  5. Step 5: Solve for x
    x = 366,602,726,881.40/611,317.65
  6. Step 6: Final answer
    x = 599,692.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.