Home / 390,547.04-585,151.84-213,178.56

Finding the Fourth Proportional to 390,547.04, 585,151.84 and 213,178.56

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Solution

The fourth proportional to 390,547.04, 585,151.84 and 213,178.56 is: 319,402.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,547.04 : 585,151.84 = 213,178.56 : x
  2. Step 2: Convert to fraction form
    390,547.04/585,151.84 = 213,178.56/x
  3. Step 3: Cross multiply
    390,547.04x = 585,151.84 × 213,178.56
  4. Step 4: Simplify right side
    390,547.04x = 124,741,826,632.55
  5. Step 5: Solve for x
    x = 124,741,826,632.55/390,547.04
  6. Step 6: Final answer
    x = 319,402.82

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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.