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Finding the Fourth Proportional to 426,154,402.60, 639,231,603.90 and 288,404,895.40

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Solution

The fourth proportional to 426,154,402.60, 639,231,603.90 and 288,404,895.40 is: 432,607,343.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,154,402.60 : 639,231,603.90 = 288,404,895.40 : x
  2. Step 2: Convert to fraction form
    426,154,402.60/639,231,603.90 = 288,404,895.40/x
  3. Step 3: Cross multiply
    426,154,402.60x = 639,231,603.90 × 288,404,895.40
  4. Step 4: Simplify right side
    426,154,402.60x = 184,357,523,859,153,696
  5. Step 5: Solve for x
    x = 184,357,523,859,153,696/426,154,402.60
  6. Step 6: Final answer
    x = 432,607,343.10

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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.