Home / 839,112.15-1,158,547.28-645,178.71

Finding the Fourth Proportional to 839,112.15, 1,158,547.28 and 645,178.71

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Solution

The fourth proportional to 839,112.15, 1,158,547.28 and 645,178.71 is: 890,786.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,112.15 : 1,158,547.28 = 645,178.71 : x
  2. Step 2: Convert to fraction form
    839,112.15/1,158,547.28 = 645,178.71/x
  3. Step 3: Cross multiply
    839,112.15x = 1,158,547.28 × 645,178.71
  4. Step 4: Simplify right side
    839,112.15x = 747,470,036,358.52
  5. Step 5: Solve for x
    x = 747,470,036,358.52/839,112.15
  6. Step 6: Final answer
    x = 890,786.81

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1.5x scale

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.