Home / 625,429,507.69-862,734,132.16-390,071,557.81

Finding the Fourth Proportional to 625,429,507.69, 862,734,132.16 and 390,071,557.81

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Solution

The fourth proportional to 625,429,507.69, 862,734,132.16 and 390,071,557.81 is: 538,075,103.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,429,507.69 : 862,734,132.16 = 390,071,557.81 : x
  2. Step 2: Convert to fraction form
    625,429,507.69/862,734,132.16 = 390,071,557.81/x
  3. Step 3: Cross multiply
    625,429,507.69x = 862,734,132.16 × 390,071,557.81
  4. Step 4: Simplify right side
    625,429,507.69x = 336,528,046,907,509,632
  5. Step 5: Solve for x
    x = 336,528,046,907,509,632/625,429,507.69
  6. Step 6: Final answer
    x = 538,075,103.22

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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.