Home / 1,178,689.80-1,768,034.70-390,721.80

Finding the Fourth Proportional to 1,178,689.80, 1,768,034.70 and 390,721.80

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Solution

The fourth proportional to 1,178,689.80, 1,768,034.70 and 390,721.80 is: 586,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,689.80 : 1,768,034.70 = 390,721.80 : x
  2. Step 2: Convert to fraction form
    1,178,689.80/1,768,034.70 = 390,721.80/x
  3. Step 3: Cross multiply
    1,178,689.80x = 1,768,034.70 × 390,721.80
  4. Step 4: Simplify right side
    1,178,689.80x = 690,809,700,446.46
  5. Step 5: Solve for x
    x = 690,809,700,446.46/1,178,689.80
  6. Step 6: Final answer
    x = 586,082.70

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1.5x scale

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.