Home / 917,939,858.40-1,266,720,048.72-500,243,175.36

Finding the Fourth Proportional to 917,939,858.40, 1,266,720,048.72 and 500,243,175.36

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Solution

The fourth proportional to 917,939,858.40, 1,266,720,048.72 and 500,243,175.36 is: 690,315,442.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,939,858.40 : 1,266,720,048.72 = 500,243,175.36 : x
  2. Step 2: Convert to fraction form
    917,939,858.40/1,266,720,048.72 = 500,243,175.36/x
  3. Step 3: Cross multiply
    917,939,858.40x = 1,266,720,048.72 × 500,243,175.36
  4. Step 4: Simplify right side
    917,939,858.40x = 633,668,059,463,866,752
  5. Step 5: Solve for x
    x = 633,668,059,463,866,752/917,939,858.40
  6. Step 6: Final answer
    x = 690,315,442.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.