Home / 786,407,382.80-1,180,366,901.40-398,668,029.20

Finding the Fourth Proportional to 786,407,382.80, 1,180,366,901.40 and 398,668,029.20

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Solution

The fourth proportional to 786,407,382.80, 1,180,366,901.40 and 398,668,029.20 is: 598,385,209.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,407,382.80 : 1,180,366,901.40 = 398,668,029.20 : x
  2. Step 2: Convert to fraction form
    786,407,382.80/1,180,366,901.40 = 398,668,029.20/x
  3. Step 3: Cross multiply
    786,407,382.80x = 1,180,366,901.40 × 398,668,029.20
  4. Step 4: Simplify right side
    786,407,382.80x = 470,574,546,314,048,768
  5. Step 5: Solve for x
    x = 470,574,546,314,048,768/786,407,382.80
  6. Step 6: Final answer
    x = 598,385,209.25

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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.