Home / 786,407,389.80-1,180,366,911.90-398,668,036.20

Finding the Fourth Proportional to 786,407,389.80, 1,180,366,911.90 and 398,668,036.20

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Solution

The fourth proportional to 786,407,389.80, 1,180,366,911.90 and 398,668,036.20 is: 598,385,219.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,407,389.80 : 1,180,366,911.90 = 398,668,036.20 : x
  2. Step 2: Convert to fraction form
    786,407,389.80/1,180,366,911.90 = 398,668,036.20/x
  3. Step 3: Cross multiply
    786,407,389.80x = 1,180,366,911.90 × 398,668,036.20
  4. Step 4: Simplify right side
    786,407,389.80x = 470,574,558,762,631,424
  5. Step 5: Solve for x
    x = 470,574,558,762,631,424/786,407,389.80
  6. Step 6: Final answer
    x = 598,385,219.76

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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.