Home / 289,656,985.60-434,485,478.40-257,912,243.20

Finding the Fourth Proportional to 289,656,985.60, 434,485,478.40 and 257,912,243.20

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Solution

The fourth proportional to 289,656,985.60, 434,485,478.40 and 257,912,243.20 is: 386,868,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,656,985.60 : 434,485,478.40 = 257,912,243.20 : x
  2. Step 2: Convert to fraction form
    289,656,985.60/434,485,478.40 = 257,912,243.20/x
  3. Step 3: Cross multiply
    289,656,985.60x = 434,485,478.40 × 257,912,243.20
  4. Step 4: Simplify right side
    289,656,985.60x = 112,059,124,371,969,136
  5. Step 5: Solve for x
    x = 112,059,124,371,969,136/289,656,985.60
  6. Step 6: Final answer
    x = 386,868,364.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.