Home / 625,429,506.69-862,734,130.79-390,071,556.81

Finding the Fourth Proportional to 625,429,506.69, 862,734,130.79 and 390,071,556.81

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Solution

The fourth proportional to 625,429,506.69, 862,734,130.79 and 390,071,556.81 is: 538,075,101.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,429,506.69 : 862,734,130.79 = 390,071,556.81 : x
  2. Step 2: Convert to fraction form
    625,429,506.69/862,734,130.79 = 390,071,556.81/x
  3. Step 3: Cross multiply
    625,429,506.69x = 862,734,130.79 × 390,071,556.81
  4. Step 4: Simplify right side
    625,429,506.69x = 336,528,045,508,427,072
  5. Step 5: Solve for x
    x = 336,528,045,508,427,072/625,429,506.69
  6. Step 6: Final answer
    x = 538,075,101.84

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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.