Home / 1,178,686.80-1,768,030.20-390,718.80

Finding the Fourth Proportional to 1,178,686.80, 1,768,030.20 and 390,718.80

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Solution

The fourth proportional to 1,178,686.80, 1,768,030.20 and 390,718.80 is: 586,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178,686.80 : 1,768,030.20 = 390,718.80 : x
  2. Step 2: Convert to fraction form
    1,178,686.80/1,768,030.20 = 390,718.80/x
  3. Step 3: Cross multiply
    1,178,686.80x = 1,768,030.20 × 390,718.80
  4. Step 4: Simplify right side
    1,178,686.80x = 690,802,638,107.76
  5. Step 5: Solve for x
    x = 690,802,638,107.76/1,178,686.80
  6. Step 6: Final answer
    x = 586,078.20

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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.