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Finding the Fourth Proportional to 722,798,599.71, 997,386,981.21 and 425,423,107.11

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Solution

The fourth proportional to 722,798,599.71, 997,386,981.21 and 425,423,107.11 is: 587,039,693.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,798,599.71 : 997,386,981.21 = 425,423,107.11 : x
  2. Step 2: Convert to fraction form
    722,798,599.71/997,386,981.21 = 425,423,107.11/x
  3. Step 3: Cross multiply
    722,798,599.71x = 997,386,981.21 × 425,423,107.11
  4. Step 4: Simplify right side
    722,798,599.71x = 424,311,468,537,421,440
  5. Step 5: Solve for x
    x = 424,311,468,537,421,440/722,798,599.71
  6. Step 6: Final answer
    x = 587,039,693.64

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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.