Home / 390,935,762.72-539,585,306.02-223,768,940.38

Finding the Fourth Proportional to 390,935,762.72, 539,585,306.02 and 223,768,940.38

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Solution

The fourth proportional to 390,935,762.72, 539,585,306.02 and 223,768,940.38 is: 308,854,916.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,935,762.72 : 539,585,306.02 = 223,768,940.38 : x
  2. Step 2: Convert to fraction form
    390,935,762.72/539,585,306.02 = 223,768,940.38/x
  3. Step 3: Cross multiply
    390,935,762.72x = 539,585,306.02 × 223,768,940.38
  4. Step 4: Simplify right side
    390,935,762.72x = 120,742,432,172,713,424
  5. Step 5: Solve for x
    x = 120,742,432,172,713,424/390,935,762.72
  6. Step 6: Final answer
    x = 308,854,916.04

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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.