Home / 811,784,477.19-1,218,137,351.55-438,287,389.47

Finding the Fourth Proportional to 811,784,477.19, 1,218,137,351.55 and 438,287,389.47

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Solution

The fourth proportional to 811,784,477.19, 1,218,137,351.55 and 438,287,389.47 is: 657,679,784.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,784,477.19 : 1,218,137,351.55 = 438,287,389.47 : x
  2. Step 2: Convert to fraction form
    811,784,477.19/1,218,137,351.55 = 438,287,389.47/x
  3. Step 3: Cross multiply
    811,784,477.19x = 1,218,137,351.55 × 438,287,389.47
  4. Step 4: Simplify right side
    811,784,477.19x = 533,894,239,826,749,184
  5. Step 5: Solve for x
    x = 533,894,239,826,749,184/811,784,477.19
  6. Step 6: Final answer
    x = 657,679,784.26

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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.