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Finding the Fourth Proportional to 668,950,062.55, 922,779,126.28 and 621,602,821.24

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Solution

The fourth proportional to 668,950,062.55, 922,779,126.28 and 621,602,821.24 is: 857,466,260.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,950,062.55 : 922,779,126.28 = 621,602,821.24 : x
  2. Step 2: Convert to fraction form
    668,950,062.55/922,779,126.28 = 621,602,821.24/x
  3. Step 3: Cross multiply
    668,950,062.55x = 922,779,126.28 × 621,602,821.24
  4. Step 4: Simplify right side
    668,950,062.55x = 573,602,108,277,030,208
  5. Step 5: Solve for x
    x = 573,602,108,277,030,208/668,950,062.55
  6. Step 6: Final answer
    x = 857,466,260.02

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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.