Home / 287,964,090.74-397,390,439.05-155,805,087.30

Finding the Fourth Proportional to 287,964,090.74, 397,390,439.05 and 155,805,087.30

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Solution

The fourth proportional to 287,964,090.74, 397,390,439.05 and 155,805,087.30 is: 215,011,017.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,964,090.74 : 397,390,439.05 = 155,805,087.30 : x
  2. Step 2: Convert to fraction form
    287,964,090.74/397,390,439.05 = 155,805,087.30/x
  3. Step 3: Cross multiply
    287,964,090.74x = 397,390,439.05 × 155,805,087.30
  4. Step 4: Simplify right side
    287,964,090.74x = 61,915,452,045,604,600
  5. Step 5: Solve for x
    x = 61,915,452,045,604,600/287,964,090.74
  6. Step 6: Final answer
    x = 215,011,017.13

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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.