Home / 990,069.80-1,484,813.10-390,831.80

Finding the Fourth Proportional to 990,069.80, 1,484,813.10 and 390,831.80

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Solution

The fourth proportional to 990,069.80, 1,484,813.10 and 390,831.80 is: 586,132.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,069.80 : 1,484,813.10 = 390,831.80 : x
  2. Step 2: Convert to fraction form
    990,069.80/1,484,813.10 = 390,831.80/x
  3. Step 3: Cross multiply
    990,069.80x = 1,484,813.10 × 390,831.80
  4. Step 4: Simplify right side
    990,069.80x = 580,312,176,536.58
  5. Step 5: Solve for x
    x = 580,312,176,536.58/990,069.80
  6. Step 6: Final answer
    x = 586,132.59

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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.