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Finding the Fourth Proportional to 641,656,782.65, 960,827,556 and 442,849,524.15

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Solution

The fourth proportional to 641,656,782.65, 960,827,556 and 442,849,524.15 is: 663,130,255.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,656,782.65 : 960,827,556 = 442,849,524.15 : x
  2. Step 2: Convert to fraction form
    641,656,782.65/960,827,556 = 442,849,524.15/x
  3. Step 3: Cross multiply
    641,656,782.65x = 960,827,556 × 442,849,524.15
  4. Step 4: Simplify right side
    641,656,782.65x = 425,502,025,960,003,328
  5. Step 5: Solve for x
    x = 425,502,025,960,003,328/641,656,782.65
  6. Step 6: Final answer
    x = 663,130,255.10

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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.