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Finding the Fourth Proportional to 1,387,673,312.24, 1,915,417,978.14 and 892,636,020.74

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Solution

The fourth proportional to 1,387,673,312.24, 1,915,417,978.14 and 892,636,020.74 is: 1,232,113,543.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,673,312.24 : 1,915,417,978.14 = 892,636,020.74 : x
  2. Step 2: Convert to fraction form
    1,387,673,312.24/1,915,417,978.14 = 892,636,020.74/x
  3. Step 3: Cross multiply
    1,387,673,312.24x = 1,915,417,978.14 × 892,636,020.74
  4. Step 4: Simplify right side
    1,387,673,312.24x = 1,709,771,082,060,745,984
  5. Step 5: Solve for x
    x = 1,709,771,082,060,745,984/1,387,673,312.24
  6. Step 6: Final answer
    x = 1,232,113,543.57

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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.