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Finding the Fourth Proportional to 390,335.77, 583,899.81 and 311,603.77

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Solution

The fourth proportional to 390,335.77, 583,899.81 and 311,603.77 is: 466,125.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,335.77 : 583,899.81 = 311,603.77 : x
  2. Step 2: Convert to fraction form
    390,335.77/583,899.81 = 311,603.77/x
  3. Step 3: Cross multiply
    390,335.77x = 583,899.81 × 311,603.77
  4. Step 4: Simplify right side
    390,335.77x = 181,945,382,098.28
  5. Step 5: Solve for x
    x = 181,945,382,098.28/390,335.77
  6. Step 6: Final answer
    x = 466,125.31

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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.