Home / 391,562,156,299.72-540,355,801,678.29-217,943,569,808.46

Finding the Fourth Proportional to 391,562,156,299.72, 540,355,801,678.29 and 217,943,569,808.46

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Solution

The fourth proportional to 391,562,156,299.72, 540,355,801,678.29 and 217,943,569,808.46 is: 300,762,140,798.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,562,156,299.72 : 540,355,801,678.29 = 217,943,569,808.46 : x
  2. Step 2: Convert to fraction form
    391,562,156,299.72/540,355,801,678.29 = 217,943,569,808.46/x
  3. Step 3: Cross multiply
    391,562,156,299.72x = 540,355,801,678.29 × 217,943,569,808.46
  4. Step 4: Simplify right side
    391,562,156,299.72x = 117,767,072,384,478,752,014,336
  5. Step 5: Solve for x
    x = 117,767,072,384,478,752,014,336/391,562,156,299.72
  6. Step 6: Final answer
    x = 300,762,140,798.75

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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.