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Finding the Fourth Proportional to 397,403.70, 596,105.55 and 390,842.70

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Solution

The fourth proportional to 397,403.70, 596,105.55 and 390,842.70 is: 586,264.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,403.70 : 596,105.55 = 390,842.70 : x
  2. Step 2: Convert to fraction form
    397,403.70/596,105.55 = 390,842.70/x
  3. Step 3: Cross multiply
    397,403.70x = 596,105.55 × 390,842.70
  4. Step 4: Simplify right side
    397,403.70x = 232,983,502,646.99
  5. Step 5: Solve for x
    x = 232,983,502,646.99/397,403.70
  6. Step 6: Final answer
    x = 586,264.05

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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.