Home / 357,117,128.40-492,875,424.28-217,968,750.40

Finding the Fourth Proportional to 357,117,128.40, 492,875,424.28 and 217,968,750.40

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Solution

The fourth proportional to 357,117,128.40, 492,875,424.28 and 217,968,750.40 is: 300,829,704.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,117,128.40 : 492,875,424.28 = 217,968,750.40 : x
  2. Step 2: Convert to fraction form
    357,117,128.40/492,875,424.28 = 217,968,750.40/x
  3. Step 3: Cross multiply
    357,117,128.40x = 492,875,424.28 × 217,968,750.40
  4. Step 4: Simplify right side
    357,117,128.40x = 107,431,440,333,181,424
  5. Step 5: Solve for x
    x = 107,431,440,333,181,424/357,117,128.40
  6. Step 6: Final answer
    x = 300,829,704.85

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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.